NIGPAS OpenIR  > 中国科学院南京地质古生物研究所
A low diversity, seasonal tropical landscape dominated by conifers and peltasperms: Early Permian Abo Formation, New Mexico
DiMichele, William A.; Chaney, Dan S.; Nelson, W. John; Lucas, Spencer G.; Looy, Cindy V.; Quick, Karen; Jun, Wang (王军)
2007-07-01
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume145Issue:3-4Pages:249-273
Abstract

Walchian conifers (Walchia piniformis Sternberg, 1825) and peltasperms similar to Supaia thinnfeldioides White and cf. Supaia anomala White dominate floodplain deposits of a narrow stratigraphic interval of the middle Abo Formation, Lower Permian of central New Mexico. The plant fossils occur in thinly bedded units up to two meters thick, consisting of coarse siltstone to very fine sandstone with clay partings. Bedding is primarily tabular, thin, and bears rare ripple marks and trough cross beds. Bedding surfaces display mud cracks, raindrop imprints, horizontal and vertical burrows of invertebrates, and footprints of terrestrial vertebrates. These features indicate intermittent and generally unchannelized stream flow, with repeated exposure to air. Channels appear to have cannibalized one another on a slowly subsiding coastal plain. Conifers are dominant at three collecting sites and at three others Supaia dominates. Although each of these genera occurs in assemblages dominated by the other, there are no truly co-dominant assemblages. This pattern suggests alternative explanations. Landscapes could have consisted of a small-scale vegetational patchwork dominated almost monospecifically in any one patch, meaning that these plants could have coexisted across the landscape. On the other hand, conifer and supaioid dominance could have been temporally distinct, occurring during different episodes of sedimentation; although in the field there are no noticeable sedimentological differences between conifer-dominated and Supaia-dominated channel deposits, they may represent slightly different climatic regimes. The considerable morphological differences between conifers and Supaia suggest that the floristic patterns are not a taphonomic effect of the loss of a significant part of the original biodiversity. In general, the climate under which this vegetation developed appears to have been relatively warm and and, based on the geology (pervasive red color [oxidation], calcrete in paleosols, and abundant mud cracks evidencing ephemeral flow in streams) and biology (low floristic diversity, xeromorphic plant physiognomies). (c) 2006 Elsevier B.V. All rights reserved.

KeywordWalchia Supaia Paleoecology Perrman New Mexico Diversity
DOI10.1016/j.revpalbo.2006.11.003
Language英语
WOS KeywordPaleobotany ; Palynology ; Texas ; Sedimentology ; Stratigraphy ; Architecture ; Floras ; Plants ; Usa
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000247772200005
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/102
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorDiMichele, William A.
Affiliation1.Smithsonian Inst, NMNH, Dept Paleobiol, Washington, DC 20560 USA
2.Illinois State Geol Survey, Champaign, IL 61820 USA
3.Museum Nat Hist, Albuquerque, NM 87104 USA
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
DiMichele, William A.,Chaney, Dan S.,Nelson, W. John,et al. A low diversity, seasonal tropical landscape dominated by conifers and peltasperms: Early Permian Abo Formation, New Mexico[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2007,145(3-4):249-273.
APA DiMichele, William A..,Chaney, Dan S..,Nelson, W. John.,Lucas, Spencer G..,Looy, Cindy V..,...&Jun, Wang .(2007).A low diversity, seasonal tropical landscape dominated by conifers and peltasperms: Early Permian Abo Formation, New Mexico.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,145(3-4),249-273.
MLA DiMichele, William A.,et al."A low diversity, seasonal tropical landscape dominated by conifers and peltasperms: Early Permian Abo Formation, New Mexico".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 145.3-4(2007):249-273.
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