Morphology and development of the Red Rock Canyon alluvial fan, Clark County, Nevada

Changes in morphology and pedogenic carbonate accumulation establish relative ages of a chronosequence of calcic soils and pedogenic calcretes that underlie four surfaces identified on the Red Rock Canyon alluvial fan. All surfaces identified are formed of limestone alluvium, occur at elevations of 853 m, and share the same climate and vegetation. These surfaces were mapped and delimited by color, texture, dissection, and soil development and were ranked in relative age by elevation and topographic position; Because of difficulty in measuring pedogenic carbonate in soils derived from calcareous alluvium, a technique employing macroscopic and microscopic visual determinations, combined with Chittick analyses, was used to estimate volumetric pedogenic carbonate. From morphological correlation with {dollar}\sp{234}{dollar}U/{dollar}\sp{230}{dollar}Th dated calcic soils and pedogenic calcretes developed on nearby Kyle Canyon alluvial fan, rates of pedogenic carbonate accumulation in soils underlying Surfaces 2 and 3 range from 0.22 to 0.44 g/cm{dollar}\sp2{dollar}/ky.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Geoscience

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1988

Author dc:creator

• McDonnell-Canan, Cheryl

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/17

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1016