Results 121 to 130 of about 231,770 (260)

Cretaceous and Tertiary

open access: yes, 1997
Cretaceous and Tertiary strata, which are widely exposed throughout the Operation Porcupine map area, consist of alternating shale- and sandstone-dominant formations. Sandstone-rich Lower Cretaceous strata tend to form a northeast-trending belt, extending from the Tuktoyaktuk Peninsula, through the northern Richardson Mountains, and across the northern
openaire   +1 more source

Cool episodes in the Late Cretaceous - exploring the effects of physical forcing on Antarctic snow accumulation [PDF]

open access: yes, 2010
Until recently it was assumed that the major modern ice sheets on Antarctica became established around the Eocene-Oligocene boundary about 34 Ma ago. But new evidence (e.g.
Flögel, Sascha   +2 more
core  

GEOCHEMICAL EVALUATION OF THE MIDDLE MAGDALENA BASIN, COLOMBIA

open access: yesCT&F Ciencia, Tecnología & Futuro, 1997
The chemical composition of 25 crude oils from Tertiary reservoirs and 12 rock extracts from five organic-rich Cretaceous formations in the Middle Magdalena Basin, Colombia were studied in detail by geochemical methods in order to understand their ...
J. C RAMON, L DZOU, B GIRALDO
doaj  

On the cretaceous group in Norfolk [PDF]

open access: yesProceedings of the Geologists' Association
n ...
openaire   +2 more sources

Quality Of Groundwaters In The Area Of The Łódź Basin [PDF]

open access: yes, 2014
Published in: Origin of Relief of Central Poland and Its Anthropogenic Transformation in Łódź University Geographical Research, edited by. E.Kobojek, T.MarszałThe Łódź basin, and particularly its north-eastern fragment, has a very high economic ...
Ziułkiewicz, Maciej
core  

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