Abstract
Eastern Iowa dune orientation as a proxy for effective wind direction during the late Wisconsinan
Abstracts with programs - Geological Society of America, Vol.53(5)
Geological Society of America, 2021 annual meeting; GSA connects 2021
10/2021
DOI: 10.1130/abs/2021AM-363933
Abstract
The orientation of dunes in Eastern Iowa demonstrates the effective wind direction during the Late Wisconsin. The study area contains over 2,100 dune features mapped from 1 m LiDAR-derived rasters and SSURGO-based parent materials. The highest concentration was found on the Iowan Erosion Surface (IES). This project derived the wind direction of over 700 parabolic dunes using their arm orientation. The resulting dataset showed a Gaussian distribution with a mean around 300 degrees (WNW). This unimodal signal indicates that there was one effective wind direction (WNW) across multiple landform regions during the active phase of dune formation. These findings supports previous research indicating a WNW wind during the Late Wisconsin in the Midwest and strengthen the transport surface interpretation of the IES.
Details
- Title: Subtitle
- Eastern Iowa dune orientation as a proxy for effective wind direction during the late Wisconsinan
- Creators
- Daniel Bloch - University of Iowa, Department of Earth and Environmental Sciences Iowa City, IA USA United StatesPhillip Kerr - Iowa Geological Survey USA United States
- Resource Type
- Abstract
- Publication Details
- Abstracts with programs - Geological Society of America, Vol.53(5)
- Conference
- Geological Society of America, 2021 annual meeting; GSA connects 2021
- Publisher
- Geological Society of America (GSA)
- DOI
- 10.1130/abs/2021AM-363933
- ISSN
- 0016-7592
- Alternative title
- Geological Society of America, 2021 annual meeting; GSA connects 2021
- Language
- English
- Date published
- 10/2021
- Academic Unit
- Iowa Geological Survey; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984701804702771
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