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DOI	10.1016/j.earscirev.2018.11.010
	Sequence stratigraphic expression of greenhouse, transitional and icehouse conditions in siliciclastic successions: Paleozoic examples from the central appalachian basin, USA
	Eriksson K.A.; McClung W.S.; Simpson E.L.
发表日期	2019
ISSN	0012-9085
起始页码	176
结束页码	189
卷号	188
英文摘要	Climates during the Paleozoic varied from greenhouse to transitional to icehouse and siliciclastic successions deposited during those times have stratigraphic architectures consistent with magnitudes and frequencies of sea-level fluctuations at the time of deposition. Three Central Appalachian Basin Paleozoic successions, the Early Cambrian Chilhowee Group, the Late Devonian Foreknobs Formation, and the Early Pennsylvanian Breathitt Group, are compared and contrasted to develop models that relate stratigraphic architectures to greenhouse, transitional and icehouse conditions existing on Earth. Within the upper portion of the Early Cambrian Chilhowee Group, the Hampton and Erwin Formations represent a succession of 2 Myr (3rd-order) sequences consisting of stacked, 40–80 kyr (5th-order), marine parasequences that record low-magnitude, high-frequency sea-level changes consistent with greenhouse conditions. The Late Devonian Foreknobs Formation consists of a series of 0.8–1.0 Myr (3rd-order) composite sequences comprised of stacked unconformity-bounded, 225 to 450 kyr (4th-order) sequences, each containing 40 to 65 kyr (5th-order), marine parasequences. The bases of the unconformity-bounded sequences are marked by erosional surfaces (regressive surfaces of marine erosion, fluvial deposits, or paleosols) indicative of sea-level drops of 10 to 45 m consistent with a transitional greenhouse to icehouse climate. The Early Pennsylvanian Breathitt Group consists of stacked, unconformity-bounded, 100 kyr (4th-order) sequences that lack parasequences. Unconformity-bounded sequences are comprised of (from bottom to top): lowstand incised valley, braided alluvial deposits; transgressive tidal estuarine deposits; and progradational, highstand deltaic deposits. Depths of incised valleys and vertical transition into estuarine facies imply sea-level changes of >50 m consistent with icehouse conditions. This study demonstrates that siliciclastic successions preserve a record of sea-level changes consistent with greenhouse, transitional, and icehouse conditions on the Paleozoic Earth. © 2018 Elsevier B.V.
语种	英语
scopus关键词	alluvial deposit; deposition; estuarine sediment; Paleozoic; parasequence; sea level change; sequence stratigraphy; siliciclastic deposit; unconformity; Appalachian Basin; United States
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209984
作者单位	Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, United States; 3165 Orion Drive, Colorado Springs, CO 80906, United States; Department of Physical Sciences, Kutztown University, Kutztown, PA 19530, United States
推荐引用方式 GB/T 7714	Eriksson K.A.,McClung W.S.,Simpson E.L.. Sequence stratigraphic expression of greenhouse, transitional and icehouse conditions in siliciclastic successions: Paleozoic examples from the central appalachian basin, USA[J],2019,188.
APA	Eriksson K.A.,McClung W.S.,&Simpson E.L..(2019).Sequence stratigraphic expression of greenhouse, transitional and icehouse conditions in siliciclastic successions: Paleozoic examples from the central appalachian basin, USA.EARTH-SCIENCE REVIEWS,188.
MLA	Eriksson K.A.,et al."Sequence stratigraphic expression of greenhouse, transitional and icehouse conditions in siliciclastic successions: Paleozoic examples from the central appalachian basin, USA".EARTH-SCIENCE REVIEWS 188(2019).