Results 71 to 80 of about 64,380 (320)

Early Cretaceous–Late Miocene Basin–Mountains Pattern in the Northeastern Margin of the Tibetan Plateau, NW China: Evidence From Detrital Zircon Chronology in the Lanzhou Basin

Geological Journal, EarlyView.
Using DZmix and DZstats models, we quantified the contributions of potential sources of the Lanzhou basin. Our findings indicate that the Cenozoic cooling and denudation signals primarily originated from Qilian and West Qinling, which were the main sediment sources.
Hang Liu, Hu–jun Gong, Fen–hong Luo, Rui Zhang   +3 more
wiley   +1 more source

Palaeozoic arthropods in Baltoscandian erratics from the coastal cliffs near Gdynia in northern Poland

Geologos
Fossils recovered from Baltoscandian erratic boulders and cobbles, collected on the beach near Orłowo and Oksywie Cliff (the latter for the first time) near Gdynia in northern Poland constitute an interesting lot.
Kowalewska Agata, Jagt-Yazykova Elena
doaj   +1 more source

Dynamics of Silurian Plants as Response to Climate Changes

Life, 2021
The most ancient macroscopic plants fossils are Early Silurian cooksonioid sporophytes from the volcanic islands of the peri-Gondwanan palaeoregion (the Barrandian area, Prague Basin, Czech Republic).
Josef Pšenička, Jiří Bek, Jiří Frýda, Viktor Žárský, Monika Uhlířová, Petr Štorch   +5 more
doaj   +1 more source

A mineral reconnaissance survey of the Abington-Biggar-Moffat-area, south-central Scotland [PDF]

, 1979
Panned heavy mineral concentrates, mostly obtained from stream sediments, were collected from 195 sites in the Abington-Biggar-Moffat area. The project area, which lies immediately east of the formerly important mining district of Wanlockhead ...
Dawson, J., Floyd, J.D., Phillip, P.R.
core  

Considering the Case for Biodiversity Cycles: Reexamining the Evidence for Periodicity in the Fossil Record [PDF]

, 2007
Medvedev and Melott (2007) have suggested that periodicity in fossil biodiversity may be induced by cosmic rays which vary as the Solar System oscillates normal to the galactic disk.
AB Smith, Adrian L. Melott, AG Fischer, AG Fischer, AI Miller, AW Grabau, Bruce S. Lieberman, CL Camp, DM Raup, DM Raup, ES Vrba, FO Brigham, G Ding, GG Simpson, J Alroy, JA Van Dam, JD Scargle, JJ Sepkoski Jr, JJ Sepkoski Jr, JL Cornette, JL Cornette, JM Adrain, John Hawks, JW Kirchner, JW Kirchner, JW Kirchner, LG Henbest, M Foote, M Foote, M Omerbashich, MJ Benton, ML Droser, MV Medvedev, N Eldredge, ND Newell, ND Newell, NL Gilinsky, P Laguna, PJ Lu, RA Muller, RA Rohde, RA Rohde, RE Plotnick, RK Bambach, S Peters   +44 more
core   +5 more sources

Terrestrial Lithium Exploration Adapted From Raman Diagnosis of Phyllosilicates for Mars

Journal of Raman Spectroscopy, EarlyView.
Analyses using a benchtop Raman instrument at the University of Aberdeen and a prototype instrument for remote deployment on Mars based at the University of Leicester successfully discriminated between four varieties of mica (possibly lithium‐rich rocks).
M. McHugh, J. R. T. Armstrong, J. Parnell, H. N. Lerman, C. Malherbe, I. B. Hutchinson   +5 more
wiley   +1 more source

Geochemical features of the Lower Silurian strata in Xiushan, Chongqing: Implications for paleoclimate reconstruction

Journal of Asian Earth Sciences: X
The Silurian was featured by frequent climatic and environmental changes. Impoverished marine faunas slowly recovered from the end-Ordovician mass extinction.
La Zhang, Yang Chen, Jinhua Luan, Ruigang Zhang, Zhiwei Cui, Haitong Zhao, Qian Wang   +6 more
doaj   +1 more source

A sparsely encrusted hardground with abundant Trypanites borings from the Llandovery of the Velise River, western Estonia (Baltica) [PDF]

Estonian Journal of Earth Sciences, 2016
The Päärdu hardground from the Telychian (Rumba Formation) of western Estonia is sparsely encrusted (0.4% of the studied surface) by possible tabulate corals, sheet-like bryozoans and discoidal echinoderm holdfasts.
Olev Vinn, Ursula Toom
doaj   +1 more source

Conodont biostratigraphy of the Crawford Group, Southern Uplands, Scotland [PDF]

, 2002
Extensive new conodont collections from the Crawford Group, the oldest succession in the Southern Uplands of Scotland, support the previously documented biostratigraphical ages for the included formations.
Armstrong, Howard A., Barron, Hugh F., Floyd, James D., Tingqing, Lu   +3 more
core   +1 more source

Subtle relict channels associated with large dolines in an area formerly beneath the Laurentide Ice Sheet, northern Ohio, USA

Boreas, EarlyView.
Low‐relief dry channels appear out of place across a glaciated karst landscape in northern Ohio. Channels are only a few metres deep cut into limestone and draped with a veneer of till. Several hypotheses are proposed for explaining the channels. Low‐relief dry channels are observed across the Bellevue‐Castalia Karst Plain of north‐central Ohio, USA ...
Timothy G. Fisher, Douglas J. Aden, Brittany D. Parrick, Kennedy O. Doro, Ira D. Sasowsky, Tyler A. Norris, Giorgi Chartolani   +6 more
wiley   +1 more source