Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Jon J Smith"'
Publikováno v:
PLoS ONE, Vol 13, Iss 11, p e0207103 (2018)
This paper documents the first U-Pb zircon ages for Ashfall Fossil Beds (Nebraska, USA), a terrestrial Konservat-Lagerstätte mass-death assemblage that is arguably the most diverse of its type and age. The Ashfall tephra was correlated with ignimbri
Externí odkaz:
https://doaj.org/article/80b11748e4304556aa97e26ab3bf0e64
Publikováno v:
Midcontinent Geoscience. 3:27-34
This paper provides a summary review of proposed nomenclatural revisions to the Zarah Subgroup of the Kansas City Group (Pennsylvanian) in Kansas and outlines changes adopted by the Kansas Geological Survey. The Iola Limestone, which comprises in asc
Autor:
Maurícius Nascimento Menezes, Patrick Führ Dal' Bó, Jon J. Smith, Amanda Goulart Rodrigues, Álvaro Rodríguez-Berriguete
Publikováno v:
Journal of Sedimentary Research. 92:775-796
Paleosols are the product of ancient physical, chemical, and biological processes on the Earth's surface and, as such, may record information that can be used to reconstruct the paleoatmospheric and paleoenvironmental conditions under which they form
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 620:111574
Autor:
Jon J. Smith, Brian F. Platt
Publikováno v:
Sedimentary Geology. 443:106303
Autor:
Jon J. Smith, Sima Noghanian
Publikováno v:
2013 North Midwest Section Meeting Proceedings.
Publikováno v:
Geological Society of America Abstracts with Programs.
Publikováno v:
PALAIOS. 33:296-311
The Upper Pennsylvanian (Virgilian) Halgaito Formation (HF) is an ∼ 125–155-m-thick succession of carbonate and carbonate-cemented siliciclastic strata exposed along Cedar Mesa on the Colorado Plateau in southeastern Utah. Defining the stratigrap
Autor:
Isabel P. Montañez, R.M. Joeckel, Marina B. Suarez, Neil M.J. Crout, Barry H. Lomax, Jon J. Smith, Jon D. Richey, Garland R. Upchurch, Greg A. Ludvigson
Publikováno v:
Earth and Planetary Science Letters. 491:172-182
Past greenhouse intervals of the Mesozoic were repeatedly punctuated by Ocean Anoxic Events (OAEs), major perturbations to the global carbon cycle and abrupt climate changes that may serve as relevant analogs for Earth’s greenhouse gas-forced clima
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
In arid and semi-arid climates, soil development is strongly influenced by seasonal patterns and biogenic activity, and often results in pervasive pedogenic horizons consisting of highly concentrated carbonate. In Brazil, such horizons enriched in ca