Results 111 to 120 of about 1,800 (206)

Welsh Borderland Geological Framework Project : the geology and applied geological issues of the region around Knighton, Powys : a scoping study [PDF]

open access: yes, 2017
This presents a review of the extent of geological knowledge and available analogue and digital data for the region around Knighton, Powys (Figure 1). Although a key consideration underlying this report is the lack of modern geological mapping for the ...
Kendall, R., Thomas, C.W.
core  

Rhombot and the dawn of paleobionics. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
Ausich WI.
europepmc   +1 more source

Upper Ordovician cryptostomatid bryozoans and microfossils from the Don Braulio Formation, Eastern Precordillera, Argentina [PDF]

open access: yes, 2014
En la clásica sección de la Quebrada de Don Braulio, en la Precordillera Oriental de la Provincia de San Juan, afora la Formación Don Braulio de edad hirnantiana.
Beresi, Matilde Sylvia   +3 more
core  

Shared patterns in body size declines among crinoids during the Palaeozoic extinction events. [PDF]

open access: yesSci Rep, 2021
Salamon MA   +4 more
europepmc   +1 more source

A Chemical Analysis of Apatite and Zircon Composition From Four Minnesotan Ordovician K-Bentonite Deposits [PDF]

open access: yes, 2017
We analyzed the geochemical composition of zircon and apatite crystals found in samples of volcanic tuff collected from four distinct Ordovician volcanic eruptions (Deicke, Dickeyville, Elkport and Millbrig) of the North American Midcontinent, to better ...
Novak, Jeff
core   +1 more source

The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia

open access: yesEuropean Journal of Taxonomy
A revision of more than 660 specimens of fossil cephalopods from the Vormsi–Pirgu regional stages (late Katian Stage), Ordovician Period, of Estonia, available from the Estonian palaeontological collections, reveals the extraordinarily high cephalopod ...
Björn Kröger
doaj   +1 more source

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