South Dakota Space Grant Consortium

Other| December 01, 2001 Occurrence and Paleoecology of Marsilea from the Eocene Wasatch Formation, Johnson County, Wyoming FREDRICK J. RICH; FREDRICK J. RICH 1Department of Geology and Geography, Georgia Southern University, Statesboro, GA 30460 Search for other works by this author on: GSW Google Scholar DAVID M. JOHNSON; DAVID M. JOHNSON 2Department of Botany and Microbiology, Ohio Wesleyan University, Delaware, OH 43015 Search for other works by this author on: GSW Google Scholar THOMAS V. DURKIN THOMAS V. DURKIN 3South Dakota Space Grant Consortium, South Dakota School of Mines and Technology, Rapid City, SD 57702 Search for other works by this author on: GSW Google Scholar PALAIOS (2001) 16 (6): 608–613. https://doi.org/10.1669/0883-1351(2001)016<0608:OAPOMF>2.0.CO;2 Article history accepted: 19 Jun 2001 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation FREDRICK J. RICH, DAVID M. JOHNSON, THOMAS V. DURKIN; Occurrence and Paleoecology of Marsilea from the Eocene Wasatch Formation, Johnson County, Wyoming. PALAIOS 2001;; 16 (6): 608–613. doi: https://doi.org/10.1669/0883-1351(2001)016<0608:OAPOMF>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract Fossil Marsiliaceae, referable to Marsilea (also known as water clover or pepperwort), were found as impressions in baked claystone (clinker) of the Eocene Wasatch Formation near Buffalo, Wyoming. This is the first documented evidence of Marsilea foliage in Tertiary strata. The fossil is in the Bureau of Land Management's Petrified Tree Environmental Education Area where strata are associated with the Healy and Walters coal beds. Previous palynological analyses, the presence of the ferns Salvinia preauriculata and Lygodium kaulfussi, and the stratigraphic position of the deposits indicate an Early Eocene age for the fossils. Leaf impressions of a variety of pteridophytes and spermatophytes, in conjunction with more than 100 pollen and spore taxa, indicate deposition on a tropical to subtropical fluvial floodplain. Leaf morphology, including leaf size, shape, and venation, are very similar to living species of Marsilea. The preservation in thermally altered sedimentary rock that was derived from claystone is consistent with the plants' current preference for moist clay soils. The conservative morphology and environmental preferences of Marsilea indicate that it is an ecologically conservative genus that can be a reliable indicator of quiet freshwater habitats with clay substrata. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Other| December 01, 2001 Occurrence and Paleoecology of Marsilea from the Eocene Wasatch Formation, Johnson County, Wyoming FREDRICK J. RICH; FREDRICK J. RICH 1Department of Geology and Geography, Georgia Southern University, Statesboro, GA 30460 Search for other works by this author on: GSW Google Scholar DAVID M. JOHNSON; DAVID M. JOHNSON 2Department of Botany and Microbiology, Ohio Wesleyan University, Delaware, OH 43015 Search for other works by this author on: GSW Google Scholar THOMAS V. DURKIN THOMAS V. DURKIN 3South Dakota Space Grant Consortium, South Dakota School of Mines and Technology, Rapid City, SD 57702 Search for other works by this author on: GSW Google Scholar Author and Article Information FREDRICK J. RICH 1Department of Geology and Geography, Georgia Southern University, Statesboro, GA 30460 DAVID M. JOHNSON 2Department of Botany and Microbiology, Ohio Wesleyan University, Delaware, OH 43015 THOMAS V. DURKIN 3South Dakota Space Grant Consortium, South Dakota School of Mines and Technology, Rapid City, SD 57702 Publisher: SEPM Society for Sedimentary Geology Accepted: 19 Jun 2001 First Online: 03 Mar 2017 Online ISSN: 1938-5323 Print ISSN: 0883-1351 Society for Sedimentary Geology PALAIOS (2001) 16 (6): 608–613. https://doi.org/10.1669/0883-1351(2001)016<0608:OAPOMF>2.0.CO;2 Article history Accepted: 19 Jun 2001 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FREDRICK J. RICH, DAVID M. JOHNSON, THOMAS V. DURKIN; Occurrence and Paleoecology of Marsilea from the Eocene Wasatch Formation, Johnson County, Wyoming. PALAIOS 2001;; 16 (6): 608–613. doi: https://doi.org/10.1669/0883-1351(2001)016<0608:OAPOMF>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract Fossil Marsiliaceae, referable to Marsilea (also known as water clover or pepperwort), were found as impressions in baked claystone (clinker) of the Eocene Wasatch Formation near Buffalo, Wyoming. This is the first documented evidence of Marsilea foliage in Tertiary strata. The fossil is in the Bureau of Land Management's Petrified Tree Environmental Education Area where strata are associated with the Healy and Walters coal beds. Previous palynological analyses, the presence of the ferns Salvinia preauriculata and Lygodium kaulfussi, and the stratigraphic position of the deposits indicate an Early Eocene age for the fossils. Leaf impressions of a variety of pteridophytes and spermatophytes, in conjunction with more than 100 pollen and spore taxa, indicate deposition on a tropical to subtropical fluvial floodplain. Leaf morphology, including leaf size, shape, and venation, are very similar to living species of Marsilea. The preservation in thermally altered sedimentary rock that was derived from claystone is consistent with the plants' current preference for moist clay soils. The conservative morphology and environmental preferences of Marsilea indicate that it is an ecologically conservative genus that can be a reliable indicator of quiet freshwater habitats with clay substrata. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.