Academic literature on the topic 'Shell sculpture'

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Journal articles on the topic "Shell sculpture"

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Lezin, Peter, and Lyudmila Flyachinskaya. "Shell sculpture formation in bivalves of the genus Hiatella under different temperature conditions." Journal of the Marine Biological Association of the United Kingdom 95, no. 8 (2015): 1621–27. http://dx.doi.org/10.1017/s0025315415000259.

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This study examines the effect of water temperature on the formation of shell sculpture in young molluscs of the genus Hiatella. The larvae of H. arctica and H. gallicana were maintained under laboratory conditions at different temperature regimes. The animals were reared from late veligers to juveniles with a shell length of 700 μm. The results of the experiment showed that the shell sculpture, which is a diagnostic species character, was developed to various degrees at different temperatures. The larvae of each species grew to juveniles with variously pronounced shell sculptures ranging from
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Kohn, Alan J. "Slip-resistant silver-feet: shell form and mode of life in lower Pleistocene Argyropeza from Fiji." Journal of Paleontology 60, no. 5 (1986): 1066–74. http://dx.doi.org/10.1017/s0022336000022599.

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Asymmetric sculpture in the form of tubercles or ridges on the shells of large (mean shell length ~60 mm) turritelliform gastropods has previously been shown to enhance efficiency of the shell as a penetration anchor in burrowing through coarse sediment. The small (<8 mm) turritelliform shells of all species of Argyropeza (Family Cerithiidae) have both of these ratchetlike sculptural features. Four lines of evidence from Lower Pleistocene A. divina and A. schepmaniana from Fiji support the interpretation that they help resist back-slippage: cross-orientation, frictional asymmetry, allometri
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Crampton, James S. "Shell composition, cryptic costae, complex composite molds, and taphonomic chicanery in Mytiloides (Inoceramidae, Bivalvia)." Journal of Paleontology 78, no. 6 (2004): 1091–96. http://dx.doi.org/10.1017/s0022336000043900.

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Many bivalves and brachiopods possess multilayered shells. In one such bivalve, Mytiloides ipuanus (Wellman, 1959) (Inoceramidae), the mineralized shell comprises an outer prismatic calcite layer and an inner nacreous aragonite layer. Each of the three shell surfaces—the external, internal, and shell layers' interface—has a distinct sculpture. Pronounced costae on the shell interface are “cryptic” in the sense that, in life, they would have been barely expressed on the internal surface and only expressed as comparatively weak, broad, rounded costae on the external surface. In fossil specimens,
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Khalik, Mohd Zacaery, Kasper P. Hendriks, Jaap J. Vermeulen, and Menno Schilthuizen. "Conchological and molecular analysis of the “non-scaly” Bornean Georissa with descriptions of three new species (Gastropoda, Neritimorpha, Hydrocenidae)." ZooKeys 840 (April 17, 2019): 35–86. http://dx.doi.org/10.3897/zookeys.840.33326.

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The Bornean representatives of the genus Georissa (Hydrocenidae) have small, dextral, conical, calcareous shells consisting of ca. three teleoconch whorls. Our recent study on the Georissa of Malaysian Borneo has revealed high intra- and inter-specific variation in the “scaly” group (a group of species with striking scale-like surface sculpture). The present study on the “non-scaly” Georissa is the continuation of the species revision for the genus. The “non-scaly” species are also diverse in shell sculptures. This informal group comprises Georissa with subtle spiral and/or radial sculpture. T
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Khalik, Mohd Zacaery, Kasper P. Hendriks, Jaap J. Vermeulen, and Menno Schilthuizen. "Conchological and molecular analysis of the "non-scaly" Bornean Georissa with descriptions of three new species (Gastropoda, Neritimorpha, Hydrocenidae)." ZooKeys 840 (April 17, 2019): 35–86. https://doi.org/10.3897/zookeys.840.33326.

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The Bornean representatives of the genus Georissa (Hydrocenidae) have small, dextral, conical, calcareous shells consisting of ca. three teleoconch whorls. Our recent study on the Georissa of Malaysian Borneo has revealed high intra- and inter-specific variation in the "scaly" group (a group of species with striking scale-like surface sculpture). The present study on the "non-scaly" Georissa is the continuation of the species revision for the genus. The "non-scaly" species are also diverse in shell sculptures. This informal group comprises Georissa with subtle spiral and/or radial sculpture. T
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López, Adolfo, Janina Urcuyo, and Gabriel Vega. "Extension of the genus Pseudopeas (Dysopeas) (Gastropoda: Subulinidae) from Venezuela to Nicaragua." UNED Research Journal 7, no. 2 (2015): 333–39. http://dx.doi.org/10.22458/urj.v7i2.1162.

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The study of Nicaraguan land snails is fragmentary. Recent sampling produced specimens of an undetermined species of Pseudopeas Putzeys, 1899. This genus was segregated from Opeas Albers, 1850 by reason of its prominent rib sculpture and later re-de- scribed by Pilsbry (1906) for the characteristic spiral sculpture of its nepi- onic whorls. Baker (1927) named a new subgenus Dysopeas for species where the spiral sculpture covers the entire shell, not only the nepionic whorls. The Nicaragua specimens show nepionic and body sculptures that precisely match descriptions and illustrations given by P
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Stelbrink, Björn, Romy Richter, Frank Köhler, et al. "Global Diversification Dynamics Since the Jurassic: Low Dispersal and Habitat-Dependent Evolution Explain Hotspots of Diversity and Shell Disparity in River Snails (Viviparidae)." Systematic Biology 69, no. 5 (2020): 944–61. http://dx.doi.org/10.1093/sysbio/syaa011.

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Abstract The Viviparidae, commonly known as River Snails, is a dominant group of freshwater snails with a nearly worldwide distribution that reaches its highest taxonomic and morphological diversity in Southeast Asia. The rich fossil record is indicative of a probable Middle Jurassic origin on the Laurasian supercontinent where the group started to diversify during the Cretaceous. However, it remains uncertain when and how the biodiversity hotspot in Southeast Asia was formed. Here, we used a comprehensive genetic data set containing both mitochondrial and nuclear markers and comprising specie
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ABSALÃO, RICARDO SILVA, FRANKLIN NOEL DOS SANTOS, and DEUSINETE DE OLIVEIRA TENÓRIO. "Five new species of Turbonilla Risso, 1826 (Gastropoda, Heterobranchia, Pyramidellidae) found off the northeast coast of Brazil (02º-13º S)." Zootaxa 235, no. 1 (2003): 1. http://dx.doi.org/10.11646/zootaxa.235.1.1.

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Five new species of Turbonilla are described from the Brazilian northern continental shelf. Turbonilla virgulinoi n. sp. from off Pernambuco State (690 m depth) is diagnosed by its semi-pyriform profile and sinuous axial ribs. Turbonilla megascymna n. sp. from off Paraíba State (750 m depth) is characterized by its fragile shell and relatively large planispiral protoconch. Turbonilla kamayura n. sp. from off Paraíba State (750 m depth) is diagnosed by its slightly conical shell with convex whorls without spiral sculpture and the helicoidal protoconch. Turbonilla mermeroglaphyra n. sp. from off
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Chang, Zi-Yuan, and Thor-Seng Liew. "A molecular phylogeny of Geotrochus and Trochomorpha species (Gastropoda: Trochomorphidae) in Sabah, Malaysia reveals convergent evolution of shell morphology driven by environmental influences." PeerJ 9 (February 2, 2021): e10526. http://dx.doi.org/10.7717/peerj.10526.

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There are currently eleven Geotrochus and four Trochomorpha species in Sabah. The primary diagnostic character that separates the two genera is the intensity of sculpture on the shell upper surface. All Trochomorpha species have a coarse nodular sculpture while Geotrochus species has a non-nodular sculpture or smooth shell. However, it is known that shell characters are often evolutionary labile with high plasticity in response to environmental factors. Hence, identifying the phylogenetic and ecological determinants for the shell characters will shed light on the shell-based taxonomy. This stu
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Cavallari, Daniel Caracanhas, and Luiz Ricardo Lopes de Simone. "A new species of Arene (Vetigastropoda, Areneidae) from Canopus Bank, off NE Brazil." Papéis Avulsos de Zoologia 58 (April 19, 2018): 23. http://dx.doi.org/10.11606/1807-0205/2018.58.23.

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Arene lychee sp. nov. is described from Canopus Bank, a seamount located ~190 km off Fortaleza, Ceará, NE Brazil (02°14’25”S, 38°22’50”W), based on shell morphology. The species is characterized by a large, trochiform shell; color ranging from intense reddish to white (darker on spiral cords, lighter at base) with a yellow apex; sculpture of 3‑8 wide spiral cords with large scale-like spines; cords separated by deep interspaces with similar width, and interspaces sculptured by closely-packed, thin axial growth lines.
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Dissertations / Theses on the topic "Shell sculpture"

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Lomax, Lawrence Talbot. "The development of a self-disintegrating core-body for use in an art bronze-casting foundry which employs the ceramic-shell investment technique." Thesis, Nelson Mandela Metropolitan University, 2004. http://hdl.handle.net/10948/219.

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The development of a disintegrating core-body for use in an art bronze foundry, which employs the ceramic shell investment process, begins with an investigation of four principal materials that will constitute the core formula. The specifications for the disintegration of the designed core-body formula fall within the parameters that are normally set and used in the ceramic shell art bronze casting process. The raison d’ être for the disintegrating formula is based on the premise that cement breaks down (spalling) after being subjected to heat above a certain temperature. It was shown that pur
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Hřebíček, Lukáš. "Ověřování původních technologií pro výrobu uměleckých odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228151.

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This diploma thesis is describing making of the same art casting by using different foundry technologies/ moulds (ceramic shell mould, several types of plaster moulds including anhydride gypsum and also natural sand mould). In this thesis there is also description of casting the famous piece of bull from “Byci skala” (Bull Rock). The bull was cast into traditional clay mould which is believed to be the original technology. Also the original shape of the bull casting was reconstructed, i.e. a copy of the original bull casting made. As the main achievement of this work is an overview and compari
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Martinez, Monica Mercedes. "As we see ourselves, so shall we be seen: identity and the artist’s practice." 2012. http://hdl.handle.net/1993/8471.

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I have always been at once fascinated and disquieted by the power of history to shape identity. As a Canadian raised on the Prairies, and a transplanted Chilean immigrant who has a combination of indigenous South American and European heritage, my ethnicity has made seeing only one side of any historical event a near impossibility. How does a person with a multi-faceted ethnic identity interpret the colonization of the Americas? From the view of the indigenous part of me, who mourns the millions lost, or of the European parts of me seeking a chance at a better life? Am I the slave or the s
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Books on the topic "Shell sculpture"

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Hitchcock, Howard. Out of the fiery furnace: Casting sculpture from ceramic shell molds. W. Kaufmann, 1985.

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Waks, Luka. ha-Yehudim sheli. Mekhon Haberman le-meḥḳere sifrut, Muzeʼon le-moreshet ʻadot Yiśraʼel, 1993.

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Waks, Luka. ha- Yehudim sheli. Mekhon Haberman le-meḥḳere sifrut, Muzeʾon le-moreshet ʻadot Yiśraʾel, 1993.

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Askalany, Ahmed. And now ... shall we dance?: Art Sawa DIFC, 17 MArch-15 April 2014. Art Sawa, 2014.

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Ben-Tor, Daphna. Bi-meḥitsat ha-elim: Pesalim shel bene-temutah mi-miḳdashim Mitsriyim. Muzeʼon Yiśraʼel, 2003.

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Ben-Shalom, Yael Katz. Im ani lo yekholah le-shanot mashehu zeh hofekh li-heyot zaṿit reʼiyah sheli. Sadnaʼot ha-omanim, 1995.

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Avishay, Ayal, та Universiṭat Ḥefah Galeryah le-omanut, ред. Lamah lo: Kamah hebeṭim shel pisul ʻakhshaṿi : Yoḥai Avrahami ṿe-Yoʼav Miler, Rotem Balṿah, Galiyah Ṭalmor, Uriʼel Miron Ang'elah Ḳlain, ʻAmi Raviv. ha-Galeryah le-omanut, Universiṭat Ḥefah, 2003.

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Naor, Daphna. Laḥẓat ma baʻd-- Laḥẓat ma qabl: Ha-Regaʻ she-aḥare-- ha-regaʻ sheli-fene = A moment after-- the moment before ... ha-Galeryah le-omanut Um el-Faḥem, 2001.

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Kohen-ʻUziʼeli, Ṭanyah. ha-Taʻaśiyah ha-meḳomit shel aronot ḳevurah be-Erets Yiśraʼel ba-teḳufah ha-Romit: (meʼot 2-3 la-sef. ha-N.). ḥ. mo. l., 1996.

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Yehudah, Kohen, та Muzeʼon artsot ha-Miḳra (Jerusalem), ред. Mi-tevato shel Noaḥ: Ḥayot ba-omanut ha-ḳedumah : me-osef Leʼo Mildenberg ; [targum le-ʻIvrit ṿa-ʻarikhah, Yehudah Kohen]. Muzeʼon artsot ha-Miḳra Yerushalayim, 1997.

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Book chapters on the topic "Shell sculpture"

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"Introduction . Uncovering an American Shell Designer." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-002.

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"Appendix: Jack Christiansen’s Thin Shell Concrete Structures." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-011.

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Coltman, Viccy. "‘Placed with propriety’: The display and viewing of ancient sculpture." In Classical Sculpture and the Culture of Collecting in Britain Since 1760. Oxford University PressOxford, 2009. http://dx.doi.org/10.1093/oso/9780199551262.003.0007.

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Abstract In a letter from Charles Townley’s uncle cited in the preceding chapter, the projected location of Richard Cosway’s conversation piece (plate 18) was alluded to. Seemingly on account of its risque´ subject matter, it was not to be hung in one of the public, formal rooms in Townley’s London townhouse at the upper end of Whitehall, rather in a prominent position over the fireplace in the more intimate, informal space of the parlour. An awareness of the physical location of Cosway’s conversation piece temporarily suspends the climax of the phallic camaraderie that it celebrates in visual
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Lipps, Jere H. "Foraminiferal art through the ages." In The Evolution of Paleontological Art. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.1218(22).

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ABSTRACT Foraminifera are single-celled organisms with and without shells (tests). They have an abundant fossil record over the past 545 million years and presence in modern oceans. The art of forams is dominated by hand-drawn scientific illustrations to scanning electron microscopic images done over the past 455 years, providing vital knowledge about shelled forams. From 1665 to 1835, forams were assigned to micro-invertebrates rather than single-celled forms. With more than 75,000 publications and nearly 50,000 described species of forams, illustrations must number more than 200,000. The ill
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"Conclusion The Legacy and Future of Concrete Shells." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-010.

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"Chapter 3. Geometric Complexity: Design with Hyperbolic Paraboloid Shells, 1958–1966." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-005.

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"Chapter 5. Expanding Audience: Concrete Shells across the United States, 1963–1971." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-007.

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"Chapter 2. First Forms: Design with Cylindrical, Barrel-Vaulted Shells, 1954–1958." In Sculpture on a Grand Scale. University of Washington Press, 2019. http://dx.doi.org/10.1515/9780295745626-004.

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Dye, David H. "Cahokian Exports to Spiro." In Cahokia in Context. University Press of Florida, 2020. http://dx.doi.org/10.5744/florida/9781683400820.003.0010.

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In the twelfth century the Spiro site emerged as a substantial northern Caddoan ritual center. The Craig Mound at Spiro reveals a long history of ritual regalia inputs from the east, especially the Mississippian urban center at Cahokia. The ritual paraphernalia indicate that the Cahokian belief system played a significant role in the religious activities associated with the great mortuary and later with the spirit lodge. Inalienable goods that reached Spiro include copper plates, flint clay sculptures, shell cups and gorgets, and symbolic weaponry. The contemporaneity of Cahokia and Spiro sugg
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Stewart, Peter. "The Private Sphere." In Statues in Roman Society. Oxford University PressOxford, 2004. http://dx.doi.org/10.1093/oso/9780199240944.003.0008.

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Abstract We began our introductory journey into the world of Roman statuary with a glance at the opulence of a luxurious villa on the Via Appia. The Hellenized sculptural decoration of the Villa of the Quintilii was physically not far removed from the commemorative portraits on the street of tombs or even the monuments of the capital itself. Yet these were the cultured furnishings of the private sphere—the trappings of otium—of ideal retreat from the negotium or business of the city. We have mainly been concerned with the public sphere or the semi-public funerary displays of those who were eff
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Conference papers on the topic "Shell sculpture"

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Pottmann, Helmut, Johannes Wallner, Georg Glaeser, and Bahram Ravani. "Geometric Criteria for Gouge-Free Three-Axis Milling of Sculptured Surfaces." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/mech-5874.

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Abstract The paper presents a geometric investigation of collision-free 3-axis milling of surfaces. We consider surfaces with a global shape condition: they shall be interpretable as graphs of bivariate functions or shall be star-shaped with respect to a point. If those surfaces satisfy a local millability criterion involving curvature information, it is proved that this implies globally gouge-free milling. The proofs are based on general offset surfaces. The results can be applied to tool-motion planning and the computation of optimal cutter shapes.
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Ткачева, Лейла, Leyla Tkacheva, Юрий Хмелевский, and Yuriy Hmelevskiy. "Designing the shell of a computer manipulator using the expert evaluation method." In 29th International Conference on Computer Graphics, Image Processing and Computer Vision, Visualization Systems and the Virtual Environment GraphiCon'2019. Bryansk State Technical University, 2019. http://dx.doi.org/10.30987/graphicon-2019-1-230-232.

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The paper describes the problem of the uncomfortable use of a computer manipulator, based on various ergonomic indicators among users. The analysis of aesthetic and ergonomic parameters in similar product models. Three artistic images of a computer manipulator thematically related to the main function of the designed product were selected. For each artistic image, a conceptual design of the product body was created. Using the method of expert evaluations, design professionals determined the most promising outline solution of the case in terms of aesthetic qualities and compliance with the main
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Anderson, Brendan M., Julia Miller, Julia Miller, Warren D. Allmon, and Warren D. Allmon. "WHEN THEORETICAL MORPHOLOGY GETS REAL: 3-D PRINTING OF IDEALIZED TURRITELLID GASTROPOD SHELLS TO BETTER UNDERSTAND THE FUNCTION OF SCULPTURE AND WHORL SHAPE." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319161.

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