| Abstract: | Cold-climate eolianites contain diagnostic sedimentary features that contrast with the sedimentary features of warm-climate eolianites. Distinctive tensional, compressional, and dissipation sedimentary structures related to freezing, thawing and snow melting characterize eolian dune-sand deposits in North Park, Colorado. The North Park dunes have few of the characteristics considered to be diagnostic eolian indicators. A significant difference is the heterogeneous texture and composition of the sand. The migration rate of these active dunes is slow (???1.7 m/year) due to freezing of moisture in the sand or to burial of the sand by snow during half of the year, even though the dunes occur in a unimodal, high-energy wind environment. Bioturbation is common in both active and inactive dunes, although the dunes occur at a high elevation ({reversed tilde} 2500m) in a cold climate (3.0??C mean annual temperature). The distinctive sedimentary features observed in this cold-climate (snow-related) dune field should aid in the interpretation of eolianites and the paleoclimates in which they formed. ?? 1978. |
| Genre: | Article |
| ProdID: | 70012446 |
| Citation Author: | Ahlbrandt, T. S.; Andrews, S. |
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| Citation End Page: | 351 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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| Citation Number Of Pages: | 25 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Distinctive sedimentary features of cold-climate eolian deposits, North Park, Colorado; 1978; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Ahlbrandt, T. S.; Andrews, S. |
| Citation Start Page: | 327 |
| Citation Volume: | 25 |
| Citation Year: | 1978 |
| Type: | citation/reference |
| Text: | Distinctive sedimentary features of cold-climate eolian deposits, North Park, Colorado; 1978; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Ahlbrandt, T. S.; Andrews, S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0031-0182(78)90048-2 |
| Date Other: | Sun, 1 Jan 1978 00:00 -0600 |
| Publisher: | Elsevier |
