Results 81 to 90 of about 1,983,107 (202)
The importance of diazotrophic cyanobacteria as primary producers during Cretaceous Oceanic Anoxic Event 2 [PDF]
Biogeosciences, 2006 In Livello Bonarelli black shale deposited during Cretaceous Oceanic Anoxic Event 2 (OAE-2, ca. 94 Ma), nitrogen isotopic compositions of bulk sediments are mostly in a narrow range from –2.7 to –0.7‰. We also determined molecular
N. Ohkouchi +6 more
doaj
THE LOWER BAJOCIAN GAETANI LEVEL: LITHOSTRATIGRAPHIC MARKER OF A POTENTIAL OCEANIC ANOXIC EVENT
Rivista Italiana di Paleontologia e Stratigrafia, 2018 In this paper we document in detail the transition from the Rosso Ammonitico Lombardo to the Radiolarites outcropping at Alpe Turati (Albavilla, Como) in the Lombardy Basin of the Southern Alps.
ELISABETTA ERBA +2 more
doaj +1 more source
Boreas, EarlyView.The glacierized Valle Frías in Northern Patagonia is one of the best‐studied valleys in South America and includes varved sediments from Lago Frías. We complement this lacustrine record with a high‐resolution documentation of varve counts and their composition.
Bernd Zolitschka +6 more
wiley +1 more source
Terry M. Black, MCRD, to his family
, 1964 Terry M. Black, writing from, MCRD, San Diego, California, to his family in Van Buren, Arkansas, in September 1964, writes about basic training and his time constraints for writing letters.
Black, Terry Moore, 1946-2022;
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Journal of Anatomy, EarlyView.This article demonstrates that the teeth and rostral denticles of an extinct clade of sawfish‐like skates display an extremely derived enameloid microstructure, similar to what is known among sharks. The presence of tooth‐like enameloid microstructure in dermal denticles opens new perspectives about the origins and development of chondrichthyan ...
Endy Chateauneuf‐Gautier +1 more
wiley +1 more source
, 2011 presentationThe goal is to obtain information about chemical structure of oil shale and its kerogen. This includes chemical characterization of the shale, the isolated kerogen, and the products of pyrolysis of both the shale and kerogen, and provides ...
Orendt, Anita M.; Birgenheier, Lauren P.; Solum, Mark S.; Pugmire, Ronald J.; Facelli, Julio C.; Locke, Darren; Chapman, Karena; Seifert, Soenke; Winans, Randall; Chupas, Peter
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, 2022 Quarterly of the Colorado School of Mines, v.59 no.3.Includes illustrations, charts, graphs, tables.A Synopsis of the Responses Received by the Department of the Interior in Answer to Secretary Udall's Request for Suggestions on the Development of Oil ...
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Description and terrestrial ages of the Calama Area Meteorite Collection (Atacama Desert, Chile)
Meteoritics &Planetary Science, EarlyView.Abstract We present a comprehensive study of a meteorite collection from the Atacama Desert (Chile), the driest and most climatically stable desert in the world. This collection includes meteorites from three adjacent Dense Collection Areas (DCAs) in the northern part of the Atacama Desert: Calama, Sierra Gorda, and Chug Chug, referred to as the ...
Carine Sadaka +9 more
wiley +1 more source
, 2022 Includes illustrations, maps.The history of oil shale in the United States since the early 1900's is detailed. Research on western oil shale probably began with the work of Robert Catlin in 1915.
Russell, Paul L.
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