Results 101 to 110 of about 48,184 (267)

Lower Mississippian Lithostratigraphy, Northern Arkansas [PDF]

open access: yes, 1976
Lower Mississippian lithostratigraphic units in northern Arkansas are (ascending order) the Bachelor, St. Joe, and Boone Formations. These formations disconformably overlie Middle Ordovician to Upper Devonian strata and are overlain disconformably by ...
Manger, Walter L., Shanks, Jack L.
core   +2 more sources

Cambrian explosion condensed: High-precision geochronology of the lower Wood Canyon Formation, Nevada. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
Nelson LL   +5 more
europepmc   +1 more source

Initial Reports of the Deep Sea Drilling Project, vol. 85 [PDF]

open access: yes, 1985
Covering Leg 85 of the cruises of the Drilling Vessel Glomar Challenger Los Angeles, California, to Honolulu, Hawaii March-April 1982. Includes six chapters: 1.
Barron, John A.   +14 more
core   +1 more source

The distribution of the ammonite Gravesia (Salfeld, 1913) in the Kimmeridge Clay Formation (Late Jurassic) in Britain [PDF]

open access: yes, 2010
Species of the ammonite Gravesia (Salfeld, 1913) have a widespread distribution in Europe over a relatively narrow stratigraphical range in the late Kimmeridgian and early Tithonian stages.
Etches, S.M., Gallois, R.W.
core  

Early representatives of bryozoans from genus Nikiforovella Nekhoroshev, 1948 and their stratigraphical significance for Late Devonian-Early Carboniferous

open access: yesЛитосфера, 2017
The arm of the present paper is to evaluate the significance of species from genus Nikiforovella for stratigraphy of Devonian-Carboniferous boundary from different regions of Eurasia.
Zoya A. Tolokonnikova
doaj  

A new high-resolution δ13Ccarb isotope curve through the lower Wenlock Series of Buttington Quarry, Wales [PDF]

open access: yes, 2014
Butcher, Anthony   +3 more
core   +2 more sources

Patterns of megafloral change across the Cretaceous-Tertiary boundary in the Northern Great Plains and Rocky Mountains [PDF]

open access: yes
The spatial and temporal distribution of vegetation in the terminal Cretaceous of Western Interior North America was a complex mosaic resulting from the interaction of factors including a shifting coastline, tectonic activity, a mild, possibly ...
Hickey, Leo J., Johnson, Kirk R.
core   +1 more source

What, if anything, is a Paratrochamminoides? A key to the morphology of the Cretaceous to Cenozoic species of Conglophragmium and Paratrochamminoides (Foraminifera) [PDF]

open access: yes, 2004
We present a review of the current taxonomical status of the genus Paratrochamminoides Soliman, 1972. We recognise five main subgroups of this genus based upon the following modes of coiling: trochospiral, streptospiral, glomospiral, triloculine or ...
Kaminski, M.A., Kuhnt, W.
core  

Paleozoic radiolarian biostratigraphy

open access: yesGeodiversitas, 2017
J. Aitchison   +4 more
semanticscholar   +1 more source

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