2026-09-21T23:28:38Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/83080 2023-07-11 col_2142_5131 col_2142_14737 com_2142_5130 com_2142_690 com_2142_397

Darmody, Robert G. Tandarich, John Paul 2015-09-25T21:00:19Z 2015-09-25T21:00:19Z 10000-01-01 2001 2001 This study proposes a unified profile paradigm through the introduction of the pedo-weathering profile (PWP) concept. The pedo-weathering profile demands a re-examination of the pedological subsolum region; a region that has been studied closely by Quaternary geologists. The PWP subsolum contains a C horizon concept of more precisely defined scope than that traditionally used in pedology. In the traditional sense the interval between the solum and bedrock is designated as the C, whether pedogenically modified or not. In the PWP, the C horizon is limited to the part of the traditional C that is pedogenically altered. That part of the subsolum unaltered by pedogenic processes and not having the hardness of bedrock (R) is redefined here as the D horizon. These subsolum horizons exist worldwide in all terranes where fresh geologic materials are exposed at the earth surface and become modified by pedogenic processes; they are the evidence for land surfaces throughout the geologic record. The PWP concept should be useful in disciplines that, in reality, have overlapping interests with pedology. Made available in DSpace on 2015-09-25T21:00:19Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3030483.pdf: 6297702 bytes, checksum: 81d21a76e0a35695c92a973114e11a8a (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 84361 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 55 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/83080 (MiAaPQ)AAI3030483 eng Environmental Sciences The Evolution of the Profile Paradigm in the History of Pedology and Quaternary Geology: Concepts and Applications text Natural Resrouces and Environmental Sciences Natural Resrouces and Environmental Sciences University of Illinois at Urbana-Champaign Dissertation Ph.D.