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Journal articles on the topic 'Geochronologic'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Bowring, Samuel A., Blair Schoene, James L. Crowley, Jahandar Ramezani, and Daniel J. Condon. "High-Precision U-Pb Zircon Geochronology and the Stratigraphic Record: Progress and Promise." Paleontological Society Papers 12 (October 2006): 25–45. http://dx.doi.org/10.1017/s1089332600001339.

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High-precision geochronological techniques have improved in the past decade to the point where volcanic ash beds interstratified with fossil-bearing rocks can be dated to a precision of 0.1% or better. The integration of high-precision U-Pb zircon geochronology with bio/chemo-stratigraphic data brings about new opportunities and challenges toward constructing a fully calibrated time scale for the geologic record, which is necessary for a thorough understanding of the distribution of time and life in Earth history. Successful implementation of geochronology as an integral tool for the paleontol

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2

XIAO, LING-LING, GUO-DONG WANG, HAO WANG, ZONG-SHENG JIANG, CHUN-RONG DIWU, and CHUN-MING WU. "Zircon U–Pb geochronology of the Zanhuang metamorphic complex: reappraisal of the Palaeoproterozoic amalgamation of the Trans-North China Orogen." Geological Magazine 150, no. 4 (2013): 756–64. http://dx.doi.org/10.1017/s001675681300006x.

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AbstractAmphibolites and metapelites exposed in the Zanhuang metamorphic complex situated in the south-middle section of the Trans-North China Orogen (TNCO) underwent upper-amphibolite-facies metamorphism and record clockwise P–T paths including retrograde isothermal decompression. High-resolution zircon U–Pb geochronological analyses indicate that the metamorphic peak occurred during ~ 1840–1860 Ma, which is in accordance with the ubiquitous metamorphic ages of ~ 1850 Ma retrieved by miscellaneous geochronologic methods throughout the metamorphic terranes of the northern TNCO, confirming that

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3

Berggren, William A. "Time and time again: getting it right." Paleontological Society Special Publications 6 (1992): 27. http://dx.doi.org/10.1017/s2475262200005876.

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The passage of time cannot be measured in vacuo. Recognition of the time-continuum can only be made by reference to physical and/or biotic events in the geohistorical (rock) record. Inasmuch as these events in the rock record must be measurable in some fashion, they must be related to an objective and retrievable reference standard. Thus the “holy trinity” of litho-bio-and chronostratigraphy can serve as the material (concrete) evidence for the totally conceptual geochronologic units which have no objective existence apart from the natural world.Geochronology is defined here as the conceptual

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4

Walsh, Stephen L. "Notes on geochronologic and chronostratigraphic units." Geological Society of America Bulletin 113, no. 6 (2001): 704–13. http://dx.doi.org/10.1130/0016-7606(2001)113<0704:nogacu>2.0.co;2.

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5

Yao, Akira. "Japanese notation for chronostratigraphic and geochronologic units." Journal of the Geological Society of Japan 117, no. 5 (2011): 303–6. http://dx.doi.org/10.5575/geosoc.117.303.

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6

McAleer, Ryan, Aaron Jubb, Paul Hackley, et al. "Photoluminescence Imaging of Whole Zircon Grains on a Petrographic Microscope—An Underused Aide for Geochronologic Studies." Minerals 10, no. 10 (2020): 876. http://dx.doi.org/10.3390/min10100876.

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The refractory nature of zircon to temperature and pressure allows even a single zircon grain to preserve a rich history of magmatic, metamorphic, and hydrothermal processes. Isotopic dating of micro-domains exposed in cross-sections of zircon grains allows us to interrogate this history. Unfortunately, our ability to select the zircon grains in a heavy mineral concentrate that records the most geochronologic information is limited by our inability to predict internal zonation from observations of whole grains. Here we document the use of a petrographic microscope to observe and image the phot

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7

Schoene, Blair, Michael P. Eddy, C. Brenhin Keller, and Kyle M. Samperton. "An evaluation of Deccan Traps eruption rates using geochronologic data." Geochronology 3, no. 1 (2021): 181–98. http://dx.doi.org/10.5194/gchron-3-181-2021.

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Abstract. Recent attempts to establish the eruptive history of the Deccan Traps large igneous province have used both U−Pb (Schoene et al., 2019) and 40Ar/39Ar (Sprain et al., 2019) geochronology. Both of these studies report dates with high precision and unprecedented coverage for a large igneous province and agree that the main phase of eruptions began near the C30n–C29r magnetic reversal and waned shortly after the C29r–C29n reversal, totaling ∼ 700–800 kyr duration. These datasets can be analyzed in finer detail to determine eruption rates, which are critical for connecting volcanism, asso

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8

Shen, Zhongshan, Zhiqiang Yu, Hanqing Ye, Zuohuan Qin, and Dangpeng Xi. "Geochronological and Paleomagnetic Constraints on the Lower Cretaceous Dalazi Formation from the Yanji Basin, NE China, and its Tectonic Implication." Minerals 11, no. 5 (2021): 527. http://dx.doi.org/10.3390/min11050527.

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The Lower Cretaceous Dalazi Formation in the Yanji Basin, eastern Jilin Province is of particular interest because it contains key fresh water fossil taxa, oil and gas resources, a potential terrestrial Albian–Cenomanian boundary, and regional unconformities. However, the lack of a precise chronology for the non-marine strata has precluded a better understanding of the regional stratigraphic correlation and terrestrial processes. Here, we report magnetostratigraphic and U–Pb geochronologic results of a sedimentary sequence from the Xing’antun section in the Yanji Basin. Thirty-two zircons from

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9

Romer, Rolf L., and David Bridgwater. "Geochronologic significance of lead lines from old cratons." Chemical Geology 136, no. 1-2 (1997): 125–33. http://dx.doi.org/10.1016/s0009-2541(96)00122-2.

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10

Grotzinger, J. P., S. A. Bowring, B. Z. Saylor, and A. J. Kaufman. "Biostratigraphic and Geochronologic Constraints on Early Animal Evolution." Science 270, no. 5236 (1995): 598–604. http://dx.doi.org/10.1126/science.270.5236.598.

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11

Chamberlain, K. R., and S. A. Bowring. "Proterozoic Geochronologic and Isotopic Boundary in NW Arizona." Journal of Geology 98, no. 3 (1990): 399–416. http://dx.doi.org/10.1086/629412.

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12

Chamberlain, Elizabeth L., Steven L. Goodbred, Richard Hale, Michael S. Steckler, Jakob Wallinga, and Carol Wilson. "Integrating geochronologic and instrumental approaches across the Bengal Basin." Earth Surface Processes and Landforms 45, no. 1 (2019): 56–74. http://dx.doi.org/10.1002/esp.4687.

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13

Turner, Christine, and Fred Peterson. "Sedimentology and Stratigraphy of the Morrison Formation in Dinosaur National Monument." UW National Parks Service Research Station Annual Reports 16 (January 1, 1992): 86–91. http://dx.doi.org/10.13001/uwnpsrc.1992.3079.

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The overall goal of this study is to establish a stratigraphic, sedimentologic, and geochronologic framework for the Upper Jurassic Morrison Formation within Dinosaur National Monument and to tie that framework to the rest of the Colorado Plateau and other important vertebrate fossil-bearing localities in the western United States. The study is also intended to complement ongoing paleontological inventories of the Morrison Formation within Dinosaur National Monument (DNM).

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14

Marsicano, Claudia A., Randall B. Irmis, Adriana C. Mancuso, Roland Mundil, and Farid Chemale. "The precise temporal calibration of dinosaur origins." Proceedings of the National Academy of Sciences 113, no. 3 (2015): 509–13. http://dx.doi.org/10.1073/pnas.1512541112.

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Dinosaurs have been major components of ecosystems for over 200 million years. Although different macroevolutionary scenarios exist to explain the Triassic origin and subsequent rise to dominance of dinosaurs and their closest relatives (dinosauromorphs), all lack critical support from a precise biostratigraphically independent temporal framework. The absence of robust geochronologic age control for comparing alternative scenarios makes it impossible to determine if observed faunal differences vary across time, space, or a combination of both. To better constrain the origin of dinosaurs, we pr

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15

Tankersley, Kenneth B. "Seasonality of Stone Procurement: An Early Paleoindian Example in Northwestern New York State." North American Archaeologist 16, no. 1 (1995): 1–16. http://dx.doi.org/10.2190/u00g-9keb-c8tq-jq73.

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Early Paleoindian subsistence activities were not restricted to the procurement and processing of food. Likewise, studies of early Paleoindian subsistence cycles should not depend solely upon seasonality data from plant and animal remains. Geographic, geochronologic, geologic, and pedologic data obtained from the Emanon Pond site, an early Paleoindian workshop-habitation in northwestern New York state, are used to reconstruct the seasonality of stone procurement. In doing so, a more detailed picture of early Paleoindian subsistence cycles can be made.

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16

Eyster, Athena, Benjamin P. Weiss, Karl Karlstrom, and Francis A. Macdonald. "Paleomagnetism of the Chuar Group and evaluation of the late Tonian Laurentian apparent polar wander path with implications for the makeup and breakup of Rodinia." GSA Bulletin 132, no. 3-4 (2019): 710–38. http://dx.doi.org/10.1130/b32012.1.

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AbstractPaleogeographic models commonly assume that the supercontinent Rodinia was long-lived, with a static geometry involving Mesoproterozoic links that developed during assembly and persisted until Neoproterozoic rifting. However, Rodinian paleogeography and dynamics of continental separation around its centerpiece, Laurentia, remain poorly constrained. On the western Laurentian margin, geological and geochronological data suggest that breakup did not occur until after 720 Ma. Thus, late Tonian (ca. 780–720 Ma) paleomagnetic data are critical for reconstructing paleogeography prior to dispe

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17

Remane, Jürgen. "Chronostratigraphic correlations: their importance for the definition of geochronologic units." Palaeogeography, Palaeoclimatology, Palaeoecology 196, no. 1-2 (2003): 7–18. http://dx.doi.org/10.1016/s0031-0182(03)00310-9.

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18

Easton, R. M., L. E. Edwards, and B. R. Wardlaw. "Discussion and reply: Notes on geochronologic and chronostratigraphic units - Discussion." Geological Society of America Bulletin 115, no. 8 (2003): 1016–17. http://dx.doi.org/10.1130/b25193d.1.

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19

Hacker, B. R., J. L. Mosenfelder, and E. Gnos. "Rapid emplacement of the Oman ophiolite: Thermal and geochronologic constraints." Tectonics 15, no. 6 (1996): 1230–47. http://dx.doi.org/10.1029/96tc01973.

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20

ZARTMAN, ROBERT E. "Three decades of geochronologic studies in the New England Appalachians." Geological Society of America Bulletin 100, no. 8 (1988): 1168–80. http://dx.doi.org/10.1130/0016-7606(1988)100<1168:tdogsi>2.3.co;2.

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21

Turner, Christine, and Fred Peterson. "Sedimentology and Stratigraphy of the Morrison Formation in Dinasuar National Monumant." UW National Parks Service Research Station Annual Reports 14 (January 1, 1990): 43–44. http://dx.doi.org/10.13001/uwnpsrc.1990.2869.

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The objective of this study is to establish a stratigraphic, sedimentologic, and geochronologic framework of the Upper Jurassic Morrison Formation within Dinosaur National Monument, and to tie this framework to the rest of the Colorado Plateau and other important fossil-bearing localities. The study is designed to complement ongoing paleontological inventories of the Morrison Formation within the Monument. During the first field season, emphasis was placed on beginning detailed stratigraphic and sedimentologic work and the collection of samples for various types of analyses.

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22

Trop, Jeffrey M., Jeffrey A. Benowitz, Donald Q. Koepp, et al. "Stitch in the ditch: Nutzotin Mountains (Alaska) fluvial strata and a dike record ca. 117–114 Ma accretion of Wrangellia with western North America and initiation of the Totschunda fault." Geosphere 16, no. 1 (2019): 82–110. http://dx.doi.org/10.1130/ges02127.1.

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Abstract The Nutzotin basin of eastern Alaska consists of Upper Jurassic through Lower Cretaceous siliciclastic sedimentary and volcanic rocks that depositionally overlie the inboard margin of Wrangellia, an accreted oceanic plateau. We present igneous geochronologic data from volcanic rocks and detrital geochronologic and paleontological data from nonmarine sedimentary strata that provide constraints on the timing of deposition and sediment provenance. We also report geochronologic data from a dike injected into the Totschunda fault zone, which provides constraints on the timing of intra–sutu

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23

SCHMIEDER, MARTIN, BARRY J. SHAULIS, THOMAS J. LAPEN, and DAVID A. KRING. "U–Th–Pb systematics in zircon and apatite from the Chicxulub impact crater, Yucatán, Mexico." Geological Magazine 155, no. 6 (2017): 1330–50. http://dx.doi.org/10.1017/s0016756817000255.

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AbstractThis work presents a systematic study of zircon and apatite in melt-bearing impactites from the annular trough of the ~180 km and ~66.04 Ma Chicxulub impact crater, Yucatán, Mexico, usingin situlaser ablation – inductively coupled plasma mass spectrometry, in which the petrologic context of the analysed minerals was assessed. Geochronologic U–Pb results for variably shocked zircon from the Yaxcopoil-1 core, including monocrystalline grains and neocrystallised granular aggregates, yielded a discordant array of ages representing the Early Palaeozoic age of the crystalline–metamorphic May

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24

Wintsch, Robert P., Huai-Jen Yang, Xian-Hua Li, and Kuo-An Tung. "Geochronologic evidence for a cold arc–continent collision: The Taiwan orogeny." Lithos 125, no. 1-2 (2011): 236–48. http://dx.doi.org/10.1016/j.lithos.2011.02.009.

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25

Winslow, David M., Peter K. Zeitler, C. Page Chamberlain, and Ian S. Williams. "Geochronologic constraints on syntaxial development in the Nanga Parbat region, Pakistan." Tectonics 15, no. 6 (1996): 1292–308. http://dx.doi.org/10.1029/96tc00032.

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26

Cornejo, Paula, Richard M. Tosdal, Constantino Mpodozis, Andrew J. Tomlinson, Orlando Rivera, and C. Mark Fanning. "El Salvador, Chile Porphyry Copper Deposit Revisited: Geologic and Geochronologic Framework." International Geology Review 39, no. 1 (1997): 22–54. http://dx.doi.org/10.1080/00206819709465258.

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27

Stern, Robert J., and Alfred Kröner. "Late Precambrian Crustal Evolution in NE Sudan: Isotopic and Geochronologic Constraints." Journal of Geology 101, no. 5 (1993): 555–74. http://dx.doi.org/10.1086/648249.

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28

Tang, Su, and Roger J. Cuffey. "Inconobotopora lichenoporoides, a new genus and species of cystoporate bryozoan from the Silurian of Gotland, and its evolutionary implications." Journal of Paleontology 72, no. 2 (1998): 256–64. http://dx.doi.org/10.1017/s002233600003626x.

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An unusual, lichenoporid-like bryozoan colony from Mid-Silurian strata on Gotland is described as a new cystoporate, Inconobotopora lichenoporoides new genus and species; a poorly known form from the same area and approximate horizon is reclassified as Inconobotopora silurica (Hennig, 1906). Similarities in overall morphology, particularly flagged by the distinctive radial-disk construction, combine with geochronologic sequence to suggest the possibility of an evolutionary lineage from Ordovician Constellaria, through Silurian Inconobotopora, to Devonian Botryllopora, and perhaps even on to Cr

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29

Segev, Amit, Eytan Sass, Hagai Ron, Barbu Lang, Yehoshua Kolodny, and Michael McWilliams. "Stratigraphic, geochronologic, and paleomagnetic constraints on Late Cretaceous volcanism in northern Israel." Israel Journal of Earth Sciences 51, no. 3-4 (2002): 297–309. http://dx.doi.org/10.1560/vutp-rnr5-uu08-y7wt.

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30

Poletaev, V. I., and T. S. Ryabokon. "RELATION OF GEOCHRONOLOGIC, CHRONOSTRATIGRAPHIC AND REGIONAL UNITS AND PRPBLEMS OF THEIR CLASSIFICATION." Tectonics and Stratigraphy, no. 43 (August 3, 2016): 69–82. http://dx.doi.org/10.30836/igs.0375-7773.2016.108292.

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31

MacLean, J. S., J. W. Sears, K. R. Chamberlain, et al. "Detrital zircon geochronologic tests of the SE Siberia-SW Laurentia paleocontinental connection." Stephan Mueller Special Publication Series 4 (September 17, 2009): 111–16. http://dx.doi.org/10.5194/smsps-4-111-2009.

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Abstract. Strikingly similar Late Mesoproterozoic stratigraphic sequences and correlative U-Pb detrital-zircon ages may indicate that the Sette Daban region of southeastern Siberia and the Death Valley region of southwestern North America were formerly contiguous parts of a Grenville foreland basin. The Siberian section contains large numbers of detrital zircons that correlate with Grenville, Granite-Rhyolite, and Yavapai basement provinces of North America. The sections in both Siberia and Death Valley exhibit west-directed thrust faults that may represent remnants of a Grenville foreland thr

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32

Mahan, Shannon A., Harrison J. Gray, Jeffrey S. Pigati, et al. "A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado." Quaternary Research 82, no. 3 (2014): 490–503. http://dx.doi.org/10.1016/j.yqres.2014.03.004.

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AbstractThe Ziegler Reservoir fossil site near Snowmass Village, Colorado (USA), provides a unique opportunity to reconstruct high-altitude paleoenvironmental conditions in the Rocky Mountains during the Last Interglacial Period. We used four different techniques to establish a chronological framework for the site. Radiocarbon dating of lake organics, bone collagen, and shell carbonate, and in situ cosmogenic 10Be and 26Al ages on a boulder on the crest of a moraine that impounded the lake suggest that the ages of the sediments that hosted the fossils are between ~140 ka and >45 ka. Uranium

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33

de Leeuw, Arjan, Oleg Mandic, Wout Krijgsman, Klaudia Kuiper, and Hazim Hrvatović. "Paleomagnetic and geochronologic constraints on the geodynamic evolution of the Central Dinarides." Tectonophysics 530-531 (March 2012): 286–98. http://dx.doi.org/10.1016/j.tecto.2012.01.004.

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34

Hertelendi, Ede, Pål Sümegi, and Gyula Szöör. "Geochronologic and Paleoclimatic Characterization of Quaternary Sediments in the Great Hungarian Plain." Radiocarbon 34, no. 3 (1992): 833–39. http://dx.doi.org/10.1017/s0033822200064146.

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We reconstructed the climate of the Great Hungarian Plain between the years, 7–32 ka BP using a malacothermometer method. The reconstruction is based on seven Gastropoda taxa, for which optimal temperature and tolerance ranges have been determined. The temporal scales of the malacofaunal levels were calibrated with radiocarbon data. We compared our paleotemperature values with the temperature values of existing climatic curves and found the same climatic periods.

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35

Nathan, N. P., E. Balasubramanian, Subhasish Gosh, and T. Roy Barman. "Neoproterozoic Acid Magmatism in Tamil Nadu, South India: Geochemical and Geochronologic Constraints." Gondwana Research 4, no. 4 (2001): 714–15. http://dx.doi.org/10.1016/s1342-937x(05)70511-6.

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36

Zhuang, Guangsheng, Yi Ge Zhang, Jeremy Hourigan, et al. "Microbial and Geochronologic Constraints on the Neogene Paleotopography of Northern Tibetan Plateau." Geophysical Research Letters 46, no. 3 (2019): 1312–19. http://dx.doi.org/10.1029/2018gl081505.

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37

Brent Dalrymple, G., Gerald K. Czamanske, Valeri A. Fedorenko, Oleg N. Simonov, Marvin A. Lanphere, and Alexander P. Likhachev. "A reconnaissance geochronologic study of ore-bearing and related rocks, Siberian Russia." Geochimica et Cosmochimica Acta 59, no. 10 (1995): 2071–83. http://dx.doi.org/10.1016/0016-7037(95)00127-1.

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38

Yoshida, Masaru, and Bishal N. Upreti. "Neoproterozoic India within East Gondwana: Constraints from recent geochronologic data from Himalaya." Gondwana Research 10, no. 3-4 (2006): 349–56. http://dx.doi.org/10.1016/j.gr.2006.04.011.

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39

Van Schmus, W. R., B. B. de Brito Neves, P. Hackspacher, and M. Babinski. "and geochronologic studies of the eastern Borborema Province, Northeastern Brazil: initial conclusions." Journal of South American Earth Sciences 8, no. 3-4 (1995): 267–88. http://dx.doi.org/10.1016/0895-9811(95)00013-6.

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40

Florea, Nelida, Carmen Cristache, G. Oaie, and O. Duliu. "Concordant 210Pb and 137Cs ages of black sea anoxic unconsolidated sediments." Geochronometria 38, no. 2 (2011): 101–6. http://dx.doi.org/10.2478/s13386-011-0022-9.

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Abstract Two independent geochronologic radiometric methods: 137Cs and 210Pb were used to determine the sedimentation rate and subsequently to date the oldest sediments of a 50 cm core containing unconsolidated sediments collected at a depth of 600 m below sea surface in the anoxic zone of the Western Black Sea, off the Romanian town of Constanta. Both methods gave coincident value within experimental uncertainties of 0.42±0.20 mm·y−1 for 137Cs and 0.49±0.03 mm·y−1 in the case of 210Pb, within the Constant Initial Concentration model, which gave for the lower most sediments an age of 1.00±0.01

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Yuan, Chao, Min Sun, Mei-fu Zhou, Hui Zhou, Wen-jiao Xiao, and Ji-liang Li. "Tectonic Evolution of the West Kunlun: Geochronologic and Geochemical Constraints from Kudi Granitoids." International Geology Review 44, no. 7 (2002): 653–69. http://dx.doi.org/10.2747/0020-6814.44.7.653.

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42

Zheng, Daran, Honghe Xu, Jun Wang, Chongqing Feng, Haichun Zhang, and Su-Chin Chang. "Geochronologic age constraints on the Middle Devonian Hujiersite flora of Xinjiang, NW China." Palaeogeography, Palaeoclimatology, Palaeoecology 463 (December 2016): 230–37. http://dx.doi.org/10.1016/j.palaeo.2016.10.015.

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43

Harrison, T. Mark, Frank S. Spear, and Matthew T. Heizler. "Geochronologic studies in central New England II: Post-Acadian hinged and differential uplift." Geology 17, no. 2 (1989): 185. http://dx.doi.org/10.1130/0091-7613(1989)017<0185:gsicne>2.3.co;2.

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HARRIS, R. A., D. B. STONE, and D. L. TURNER. "Tectonic implications of paleomagnetic and geochronologic data from the Yukon-Koyukuk province, Alaska." Geological Society of America Bulletin 99, no. 3 (1987): 362. http://dx.doi.org/10.1130/0016-7606(1987)99<362:tiopag>2.0.co;2.

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45

Bibikova, E. V., S. V. Bogdanova, A. V. Postnikov, et al. "Sarmatia-Volgo-Uralia junction zone: Isotopic-geochronologic characteristic of supracrustal rocks and granitoids." Stratigraphy and Geological Correlation 17, no. 6 (2009): 561–73. http://dx.doi.org/10.1134/s086959380906001x.

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46

Herriott, Trystan M., James L. Crowley, Mark D. Schmitz, Marwan A. Wartes, and Robert J. Gillis. "Exploring the law of detrital zircon: LA-ICP-MS and CA-TIMS geochronology of Jurassic forearc strata, Cook Inlet, Alaska, USA." Geology 47, no. 11 (2019): 1044–48. http://dx.doi.org/10.1130/g46312.1.

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Abstract Uranium-lead (U-Pb) geochronology studies commonly employ the law of detrital zircon: A sedimentary rock cannot be older than its youngest zircon. This premise permits maximum depositional ages (MDAs) to be applied in chronostratigraphy, but geochronologic dates are complicated by uncertainty. We conducted laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) and chemical abrasion–thermal ionization mass spectrometry (CA-TIMS) of detrital zircon in forearc strata of southern Alaska (USA) to assess the accuracy of several MDA approaches. Six samples from Middle–Upper

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47

Boessenecker, Robert W., Dana J. Ehret, Douglas J. Long, Morgan Churchill, Evan Martin, and Sarah J. Boessenecker. "The Early Pliocene extinction of the mega-toothed shark Otodus megalodon: a view from the eastern North Pacific." PeerJ 7 (February 13, 2019): e6088. http://dx.doi.org/10.7717/peerj.6088.

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The extinct giant shark Otodus megalodon is the last member of the predatory megatoothed lineage and is reported from Neogene sediments from nearly all continents. The timing of the extinction of Otodus megalodon is thought to be Pliocene, although reports of Pleistocene teeth fuel speculation that Otodus megalodon may still be extant. The longevity of the Otodus lineage (Paleocene to Pliocene) and its conspicuous absence in the modern fauna begs the question: when and why did this giant shark become extinct? Addressing this question requires a densely sampled marine vertebrate fossil record i

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Clark, Alan H., Edward Farrar, Daniel J. Kontak, et al. "Geologic and geochronologic constraints on the metallogenic evolution of the Andes of southeastern Peru." Economic Geology 85, no. 7 (1990): 1520–83. http://dx.doi.org/10.2113/gsecongeo.85.7.1520.

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Wilde, A. R., P. Layer, T. Mernagh, and J. Foster. "The Giant Muruntau Gold Deposit: Geologic, Geochronologic, and Fluid Inclusion Constraints on Ore Genesis." Economic Geology 96, no. 3 (2001): 633–44. http://dx.doi.org/10.2113/gsecongeo.96.3.633.

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Kim, Hyeoncheol, Jong IK Lee, Moon Young Chose, et al. "Geochronologic evidence for Early Cretaceous volcanic activity on Barton Peninsula, King George Island, Antarctica." Polar Research 19, no. 2 (2000): 251–60. http://dx.doi.org/10.3402/polar.v19i2.6549.

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