Robert A. Gastaldo

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The terrestrial crisis that reportedly parallels the P/Tr marine mass extinction is based mainly on Northern Hemisphere microfloral assemblages and Southern Hemisphere Gondwanan macrofloral collections. It is well established that taphonomic filters control the ultimate collectable fossil assemblage in any depositional regime. Recognition and comparison of(More)
Isolated logs preserved in the A ¨ lterer Flußsande of the Weißelster basin, Germany, are examined relative to their subjacent bedform. Paleocurrent analyses conducted on both the log orientation and its underlying bedform are used to determine whether or not any relationship exists between these two structures. Two patterns emerge from this investigation.(More)
The Black Warrior Basin is a late Paleozoic foreland basin in Alabama and Mississippi that lies adjacent to basin formed during the early stages of Pangaean super-continent assembly, and the sedimentary fill reflects the tectonic evolution of the basin, as well as climatic changes related to drift through the southern tradewind belt The basin has a(More)
Leaves and other non-woody canopy parts are rarely preserved in coals. Although the pH of pore waters within peat swamps is usually relatively low (Ä3.5), providing geochemical conditions that would promote preservation after burial, shed canopy parts may remain at the air–soil interface for periods of up to several months prior to burial by additional(More)
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In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: An autochthonous glossopterid flora with latest Permian palynomorphs and its(More)
Continental depositional environments preserve the majority of the macrofloral record since the advent of land-plant colonization in the mid-Paleozoic, and wetland representatives are encountered more commonly than those that grew under more seasonal conditions. It has been assumed that preservation potential and future recovery of plant debris are high(More)
The Lower Triassic Katberg Formation (Beaufort Group, Karoo Supergroup) in South Africa is a fine-grained, arenaceous unit deposited under ephemeral bedload-dominated fluvial conditions and previously interpreted as representing a continuous stratigraphic record. Its genesis was linked directly to the end-Paleozoic extinction event and was considered to(More)
Partner Organizations Matching funds have been provided by the The Gordon and Betty Moore Foundation has supported a diversity of NCEAS projects. A new project is designed to identify, map and compare the importance of human impacts on the California Current marine ecosystem. This project partners the University of California with non-governmental(More)