Results 1 to 10 of about 103,646 (247)

Egg shape changes at the theropod–bird transition, and a morphometric study of amniote eggs [PDF]

open access: yesRoyal Society Open Science, 2014
The eggs of amniotes exhibit a remarkable variety of shapes, from spherical to elongate and from symmetrical to asymmetrical. We examine eggshell geometry in a diverse sample of fossil and living amniotes using geometric morphometrics and linear ...
D. Charles Deeming, Marcello Ruta
doaj   +3 more sources

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+9 more sources

Geochemistry, petrogenesis, and tectonic setting of volcanic rocks in the SW of Torud (Shahrood) [PDF]

open access: yesپترولوژی, 2023
The study area is located in the south of Damghan, 160 km south of Shahrood, and 17 to 30 km south of Torud village. The area geologically, lies in the Cenozoic magmatic belt, a part of the Alpine-Himalayan belt, in the north of the structural zone of ...
Negar Gavanji   +3 more
doaj   +1 more source

Early Agenian rhinocerotids from Wischberg (Canton Bern, Switzerland) and clarification of the systematics of the genus Diaceratherium [PDF]

open access: yesPeerJ, 2019
Background Wischberg is a Swiss locality in Bern Canton which has yielded numerous vertebrates remains from the earliest Miocene (= MN1). It has a very rich faunal diversity, one of the richest in Switzerland for this age.
Claire Jame   +3 more
doaj   +2 more sources

Seasonal climatic instability in the western Chinese Loess Plateau during Marine Isotope Stages 12–10

open access: yesScientific Reports, 2023
Because of similar astronomical background, Marine Isotope Stage (MIS) 11 is viewed as an analogue of the Holocene, but the evolution of seasonal climatic instability during MIS 11 has not been well investigated.
Fengjiang Li   +7 more
doaj   +1 more source

Evolution of the volcanic mechanism in the central part of the Urumieh-Dokhtar magmatic arc

open access: yesJournal of Economic Geology, 2021
Introduction Cenozoic volcanic activities in the Urumieh-Dokhtar Magmatic Arc (UDMA) have occurred in three main pulses of Eocene, upper Oligocene-Pliocene, and Pio-Quaternary (Dilek et al., 2010, Sayari, 2015).
Mohammad Sayari , Mortaza Sharifi
doaj   +1 more source

Depositional Record and Geochemistry Constraints on the Late Miocene–Quaternary Evolution of the Taiyuan Basin in Shanxi Rift System, China

open access: yesFrontiers in Earth Science, 2022
The formation and evolution of the Shanxi Rift System are topics of interest because of its unique geometry and critical position in the North China Plate. However, it is not easy to delineate the late Cenozoic tectonic processes.
Qitian Zhuang   +4 more
doaj   +1 more source

Impact of Cenozoic Antarctic continent-ocean configuration patterns on global climate change

open access: yesDizhi lixue xuebao, 2021
Antarctica recorded a Cenozoic geologic history of continental growth, breakup and dispersal, global cooling and the development of continental-scale Antarctic ice sheet.
PEI Junling   +8 more
doaj   +1 more source

A review of amber and copal occurrences in Africa and their paleontological significance

open access: yesBSGF - Earth Sciences Bulletin, 2020
The paleontological interest for fossil plant resins (amber and copal) has greatly increased in the last decades, as field studies have resulted in the discovery of various new deposits worldwide.
Bouju Valentine, Perrichot Vincent
doaj   +1 more source

Erosional and Tectonic Evolution of a Retroarc Orogenic Wedge as Revealed by Sedimentary Provenance: Case of the Oligocene – Miocene Patagonian Andes

open access: yesFrontiers in Earth Science, 2020
Sedimentary provenance techniques have been widely applied in foreland basin settings to understand tectonic and magmatic processes by tracking the exposure and erosion of distinct sediment source areas through time.
Joel S. Leonard   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy