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Thematische Bibliographien / Calcareous fossils

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Zeitschriftenartikel

Auswahl der wissenschaftlichen Literatur zum Thema „Calcareous fossils“

Autor: Grafiati

Veröffentlicht am 15. September 2023

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Zeitschriftenartikel zum Thema "Calcareous fossils"

1

Anderson, T. F., B. N. Popp, L. Z. HO, and A. C. Williams. "The carbon and oxygen isotopic records of fossils from the Lower Oxford Clay." Paleontological Society Special Publications 6 (1992): 7. http://dx.doi.org/10.1017/s2475262200005670.

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The excellent preservation of calcareous invertebrates and phosphatic vertebrates in the Lower Oxford Clay provides a good opportunity for paleooceanographic reconstruction based on stable isotopic abundances. We present here our initial results and interpretations on carbon and oxygen isotopic analyses on fossils of different depth habitats. Benthic fossils include epifaunal oysters and infaunal nuculacean bivalves. We also analyzed “pendant” bivalves whose depth habitat is uncertain. Fossil nekton are represented by ammonites and belemnites. Organisms that inhabited the uppermost part of the

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2

Bengtson, Stefan. "Early skeletal fossils." Paleontological Society Papers 10 (November 2004): 67–78. http://dx.doi.org/10.1017/s1089332600002345.

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The Precambrian-Cambrian transition saw the burgeoning of diverse skeletal organisms (“small shelly fossils”), represented in the fossil record by spicules, tubes, tests, conchs, shells, and a variety of sclerites and ossicles. Whereas calcareous biomineralization as such may have been facilitated by changes in ocean chemistry at this time, the utilization of biominerals in mineralized skeletons is a different process. The massive appearance of skeletons is most likely an epiphenomenon of the general radiation of body plans and tissues. The “choice” of biominerals (mainly calcium carbonates, c

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3

Wilson, J. "Approaches to the preparation and development of calcareous fossils from calcareous matrices." Geological Curator 4, no. 7 (1987): 447–50. http://dx.doi.org/10.55468/gc12.

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4

Miller, Kelly B., and Sara H. Lubkin. "Calicovatellus petrodytes, a new genus and species of primitive vatelline diving beetle (Coleoptera: Dytiscidae: Hydroporinae: Vatellini) from the Miocene Barstow Formation, southern California, USA." Journal of Paleontology 75, no. 4 (2001): 890–94. http://dx.doi.org/10.1017/s0022336000016991.

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Relatively few fossil dytiscids have been described. This is unfortunate since fossils can provide useful phylogenetic and evolutionary information including unique character combinations not present in extant taxa and minimum ages for divergences. However, even when fossils are found, important characters are often not visible since they may be poorly preserved or obscured. The fossil insects present in calcareous nodules from the Miocene Barstow Formation of the Calico Mountains in Southern California are exceptionally well preserved (Palmer, 1957). The original organisms are replaced by sil

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5

Turner, Judith. "Sponge Gemmules from Lake Sediments in the Puget Lowland, Washington." Quaternary Research 24, no. 2 (1985): 240–43. http://dx.doi.org/10.1016/0033-5894(85)90010-9.

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Gemmules of five species of freshwater sponge found in deposits at Cedar Mountain bog in the southeastern Puget Lowland were used to infer that during the late-glacial period the water was calcareous, was not deficient in SiO2, was aerobic, and had a pH in the range 6.6–8.5. This is consistent with plant fossil data. In view of their paleoenvironmental potential it is worth looking for gemmules when extracting other fossils from lake sediments.

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6

Lorcher, Fritz, and Thomas Keller. "Preparation Techniques for Material From The Posidonienschiefer (Lias Epsilon, Upper Liassic) of Germany." Geological Curator 4, no. 3 (1985): 164–68. http://dx.doi.org/10.55468/gc749.

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The authors describe methods of mechanical and chemical treatment of fossils from the Posidonienschiefer (Lias epsilon, Upper Liassic, Lower Jurassic, south-western Germany). Special tools and techniques are discussed. The use of acids in the preparation of vertebrate fossils from calcareous layers gives very good results, better than any mechanical method of preparation.

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7

R. Nimnu, J., G. O Aigbadon, and F. Ogbikaya. "Foraminiferal biostratigrpahy of oshi-13 field, coastal and central swamp depobelt, Niger delta basin, Nigeria." International Journal of Advanced Geosciences 6, no. 1 (2018): 127. http://dx.doi.org/10.14419/ijag.v6i1.10907.

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A high resolution Foraminiferal biostratigrpahic study has been carried out using data from three wells located in the Coastal and Central Swamp depobelts of Niger Delta.The study defined six (N6-N15) Foraminiferal zones for the early to middle Miocene Niger Delta on the basis of index Foraminiferal and this was correlated to Blow, 1969 and Bergreen et al., 1995. Foraminiferal analysis shows that Oshi-13Field is very rich in calcareous and araneceous benthics, calcareous and planktic foraminiferal. The abudance of fossils and index fossils are responsible for constructing the biostratigraphic

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8

Nhung, Nguyen Thi Hong, Nguyen Thi Thuy, Nguyen Viet Hien та Nguyen Huu Manh. "Quy trình gia công và phân tích hóa thạch Tảo vôi, áp dụng cho các trầm tích ven biển tỉnh Sóc Trăng". Tạp chí Khoa học và Công nghệ biển 19, № 4 (2020): 537–44. http://dx.doi.org/10.15625/1859-3097/19/4/12676.

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Calcareous nannofossils are very small microfossils composed of calcium carbonate. They are very good biostratigraphic markers within marine sediments by covering the Jurassic to present. The standard preparation of a sample for nannofossil analysis requires the collection of the largest quantity and the best fossils. Sample preparation accords to the following steps: i. Pounding sample; ii. Eliminating organic matter; iii. Washing sample; iv. Filter sample through the sieve; v. Eliminating clay; vi. Drying sample in an incubator; vii. Packing sample. Sample analysis accords to the following s

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9

Hochuli, Peter A. "‘Organic nannofossils’: a new type of palynomorph from the Palaeogene of the North Sea." Journal of Micropalaeontology 19, no. 2 (2000): 153–58. http://dx.doi.org/10.1144/jm.19.2.153.

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Abstract. Organic microfossils of regular dodecahedral shape are found in the Palaeogene (Lower Oligocene) of the central and northern parts of the Norwegian North Sea. The shape and structure of these fossils are very similar to coccospheres of the calcareous nannoplankton genus Braarudosphaera. The individual pentagonal plates show the same morphological features as replicas of the inner surface of pentaliths forming calcareous coccospheres. It is the first evidence that a representative of calcareous nannoplankton (Haptophyta, Coccolithophorales) is found to produce acid-resistant organic m

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10

Onken, Beth R., and Philip W. Signor. "Lidaconus palmettoensis n. gen. and sp.: an enigmatic Early Cambrian fossil from western Nevada." Journal of Paleontology 62, no. 2 (1988): 172–80. http://dx.doi.org/10.1017/s0022336000029826.

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Lidaconus palmettoensis n. gen. and sp. is a recently discovered fossil from the Lower Cambrian Harkless Formation (Bonnia–Olenellus Zone) in Esmeralda County, Nevada. The conoidal fossils were originally calcareous and have been replaced by silica. The cones are distinctive in their consistent morphology, the presence of weak annulations, and the lack of any internal structures such as septa, tabulae, or dissepiments. Because of the paucity of diagnostic characters due to the simple morphology and the lack of original microstructure, taxonomic affinities are uncertain.

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