Late Pleistocene-early Holocene karst features, Laguna Madre, south Texas: A record of climate change
Journal Article
·
· AAPG Bulletin
OSTI ID:411901
- Texas A&M Univ., Corpus Christi, TX (United States)
A Pleistocene coquina bordering Laguna Madre, south Texas, contains well-developed late Pleistocene-early Holocene karst features (solution pipes and caliche crusts) unknown elsewhere from coastal Texas. The coquina accumulated in a localized zone of converging longshore Gulf currents along a Gulf beach. The crusts yield {sup 14}C dates of 16,660 to 7630 B.P., with dates of individual crust horizons becoming younger upwards. The karst features provide evidence of regional late Pleistocene-early Holocene climate changes. Following the latest Wisconsinan lowstand 18,000 B.P. the regional climate was more humid and promoted karst weathering. Partial dissolution and reprecipitation of the coquina formed initial caliche crust horizons; the crust later thickened through accretion of additional carbonate laminae. With the commencement of the Holocene approximately 11,000 B.P. the regional climate became more arid. This inhibited karstification of the coquina, and caliche crust formation finally ceased about 7000 B.P.
- OSTI ID:
- 411901
- Report Number(s):
- CONF-9610180--
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 9 Vol. 80; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
Similar Records
South Texas Quaternary karst: Paleoclimatic implications
Eolian evidence for climatic fluctuations during the Late Pleistocene and Holocene in Wyoming
Late Pleistocene oscillations of Lake Owens, eastern California
Conference
·
Sun Jan 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5976270
Eolian evidence for climatic fluctuations during the Late Pleistocene and Holocene in Wyoming
Conference
·
Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6863958
Late Pleistocene oscillations of Lake Owens, eastern California
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5023976