Detailed paleoclimatic records from late Pennsylvanian polygenetic paleosols : north-central Texas, USA.

Two Canyon Group (late-Pennsylvanian, Missourian) multistory, polygenetic paleosol intervals in north-central Texas, USA record complex paleoclimatic and paleohydrologic histories. Both paleosol intervals show evidence for initial development under well-drained conditions (illuviated clay, pedogenic calcite nodules, high-chroma matrix colors) and are overprinted by features that indicate poorer drained conditions (gley matrix colors, pedogenic siderite), however overprinting occurred through rapid transgression in one paleosol and gradual sea-level rise in the other. Reconstructed physical and wet chemical soil properties indicate these paleosols were finely textured, fertile, and void of salinity problems. Paleoatmospheric pCO₂ estimates from the δ¹³C values of pedogenic calcite nodules indicate values near pre-industrial levels (360ppmV), which are in agreement with previously published proxy and modeling results. This study shows that despite multiple episodes of overprinting, a detailed paleoclimatic and paleohydrologic history can be reconstructed from paleosols using careful macro and micromorphological observations.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Masters

Grantor

Baylor University.

Year dc:date.issued

2013

Author dc:creator

• Culbertson, Amos.

Advisor dc:contributor.advisor

• Driese, Steven G.

• Paleosols.
• Late Pennsylvanian.
• Paleoclimate.
• Central Texas.
• Paleohydrology.

Statement dc:rights

• Baylor University works are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact libraryquestions@baylor.edu for inquiries about permission.

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/2104/8822

OAI identifier oai:identifier

oai:baylor-ir.tdl.org:2104/8822