Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1130/2008.2441(20) |
Paleosol archives of environmental and climatic history in paleotropical western Pangea during the latest Pennsylvanian through Early Permian | |
Tabor, Neil J.1; Montanez, Isabel P.2; Scotese, Christopher R.3; Poulsen, Christopher J.4; Mack, Greg H.5 | |
通讯作者 | Tabor, Neil J. |
会议名称 | Workshop on the Late Paleozoic Ice Age - Toward a More Refined Understanding of Timing Duration and Character held at the Annual Meeting of the Geological-Society-of-America |
会议日期 | OCT, 2005 |
会议地点 | Salt Lake City, UT |
英文摘要 | The stratigraphic and regional distributions of paleosol morphology in latest Pennsylvanian through Early Permian strata in Colorado, Utah, Arizona, New Mexico, Texas, and Oklahoma are presented in this paper. This regional extent corresponds to a paleolatitudinal gradient spanning similar to 5 degrees S to 10 degrees N. Morphological trends from this region delineate significant and systematic temporal and spatial changes in Permian-Carboniferous paleoenvironment and paleoclimate. The inferred latest Pennsylvanian (Virgilian) through early Early Permian environmental pattern is complex, but it indicates persistently dry, semiarid to arid conditions in Colorado, Utah, and Arizona, at paleolatitudes north of similar to 2 degrees N, whereas lower paleolatitude(similar to 2 degrees S to 2 degrees N) tropical regions in New Mexico exhibit a stepwise shift from subhumid to semiarid and variably seasonal conditions throughout late Pennsylvanian and the first half of Early Permian (Virgilian through Wolfcampian) time, followed by a subsequent shift to more arid conditions during the latter part of the Early Permian (Leonardian). Notably, strata from the southernmost paleosites, in Texas and Oklahoma, exhibit the most significant and abrupt climate changes through this period; they show a rapid transition from nearly ever-wet latest Pennsylvanian climate (at similar to 5 degrees S) to drier and seasonal climate across the Permian-Carboniferous system boundary, and finally to arid and seasonal climate by Leonardian time (at similar to 2-4 degrees N). The inferred climate patterns show no robust long-term correlation with the high-latitude Gondwanan records of glaciation. Rather, the long-term record of Permian-Pennsylvanian climate indicators from the southwestern United States is most simply explained by an similar to 8 degrees northward tectonic drift through (essentially) static climate zones over western tropical Pangea during the interval of study. However, the relatively rapid perturbations to climate recorded by these pedogenic archives appear to be too rapid for tectonic forces and might correspond to changes in climate drivers, such as atmospheric pCO(2), atmospheric circulation, and glacial-interglacial cycles. |
英文关键词 | paleosol Pennsylvanian Permian paleoclimate paleoenvironment |
来源出版物 | RESOLVING THE LATE PALEOZOIC ICE AGE IN TIME AND SPACE |
ISSN | 0072-1077 |
出版年 | 2008 |
卷号 | 441 |
页码 | 291-303 |
EISBN | 978-0-8137-2441-6 |
出版者 | GEOLOGICAL SOC AMER INC |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000271226700020 |
WOS关键词 | CEDAR MESA SANDSTONE ; SOUTHEASTERN UTAH ; PALEOENVIRONMENTAL RECONSTRUCTION ; PALEOZOIC LOESSITE ; EQUATORIAL PANGEA ; USA ; PALEOCLIMATE ; MIDCONTINENT ; DEGLACIATION ; EVOLUTION |
WOS类目 | Geology ; Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/297398 |
作者单位 | 1.Southern Methodist Univ, Dept Geol Sci, Dallas, TX 75275 USA; 2.Univ Calif Davis, Dept Geol, Davis, CA 95616 USA; 3.Univ Texas Arlington, Dept Geol, Arlington, TX 76019 USA; 4.Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA; 5.New Mexico State Univ, Dept Geol Sci, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Tabor, Neil J.,Montanez, Isabel P.,Scotese, Christopher R.,et al. Paleosol archives of environmental and climatic history in paleotropical western Pangea during the latest Pennsylvanian through Early Permian[C]:GEOLOGICAL SOC AMER INC,2008:291-303. |
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