A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington
The Pleistocene history of the southern Puget Lowland is marked by repeated invasions by the Puget Lobe of the Cordilleran ice sheet. The present stratigraphic sequence is represented by four glaciations (Orting, Stuck, Salmon Springs, and Fraser) of northern provenance, separated by unconformities...
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ftwestwashington:oai:cedar.wwu.edu:wwuet-1761 2023-06-11T04:12:47+02:00 A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington Roland, John L. (John Leo) 1983-01-01T08:00:00Z application/pdf https://cedar.wwu.edu/wwuet/739 https://doi.org/10.25710/pab9-0c23 https://cedar.wwu.edu/context/wwuet/article/1761/viewcontent/Redacted_REDUCED___Roland_Thesis___Compiled___Permission_Inserted.pdf English eng Western CEDAR https://cedar.wwu.edu/wwuet/739 doi:10.25710/pab9-0c23 https://cedar.wwu.edu/context/wwuet/article/1761/viewcontent/Redacted_REDUCED___Roland_Thesis___Compiled___Permission_Inserted.pdf Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission. WWU Graduate School Collection Cordilleran ice sheet Paleomagnetism Geology text 1983 ftwestwashington https://doi.org/10.25710/pab9-0c23 2023-05-07T16:42:51Z The Pleistocene history of the southern Puget Lowland is marked by repeated invasions by the Puget Lobe of the Cordilleran ice sheet. The present stratigraphic sequence is represented by four glaciations (Orting, Stuck, Salmon Springs, and Fraser) of northern provenance, separated by unconformities and two nonglacial formations (Alderton and Puyallup) of central Cascade and Mount Rainier provenances. Paleomagnetic work conducted on pre-Salmon Springs sediments at their type localities and correlative exposures in the Puyallup Valley provide evidence for the ages of the Orting Drift, Alderton Formation, Stuck Drift, and Puyallup Formation. The silts sampled demonstrate an array of soft (unconsolidated) sediment magnetic behavior. Overprinting is common and is largely attributed to VRM or CRM, yet the sediments do preserve remanent components identified as DRM or PDRM. These primary components are the result of grain alignment during a period of reversed polarity. The successful isolation of reversed remanent directions in the pre-Salmon Springs units leads to a magnetostratigraphic interpretation which restricts the deposition of these sediments to the Matuyama Reverse Epoch. Text Ice Sheet Western Washington University: CEDAR (Contributing to Education through Digital Access to Research) |
institution |
Open Polar |
collection |
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research) |
op_collection_id |
ftwestwashington |
language |
English |
topic |
Cordilleran ice sheet Paleomagnetism Geology |
spellingShingle |
Cordilleran ice sheet Paleomagnetism Geology Roland, John L. (John Leo) A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
topic_facet |
Cordilleran ice sheet Paleomagnetism Geology |
description |
The Pleistocene history of the southern Puget Lowland is marked by repeated invasions by the Puget Lobe of the Cordilleran ice sheet. The present stratigraphic sequence is represented by four glaciations (Orting, Stuck, Salmon Springs, and Fraser) of northern provenance, separated by unconformities and two nonglacial formations (Alderton and Puyallup) of central Cascade and Mount Rainier provenances. Paleomagnetic work conducted on pre-Salmon Springs sediments at their type localities and correlative exposures in the Puyallup Valley provide evidence for the ages of the Orting Drift, Alderton Formation, Stuck Drift, and Puyallup Formation. The silts sampled demonstrate an array of soft (unconsolidated) sediment magnetic behavior. Overprinting is common and is largely attributed to VRM or CRM, yet the sediments do preserve remanent components identified as DRM or PDRM. These primary components are the result of grain alignment during a period of reversed polarity. The successful isolation of reversed remanent directions in the pre-Salmon Springs units leads to a magnetostratigraphic interpretation which restricts the deposition of these sediments to the Matuyama Reverse Epoch. |
format |
Text |
author |
Roland, John L. (John Leo) |
author_facet |
Roland, John L. (John Leo) |
author_sort |
Roland, John L. (John Leo) |
title |
A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
title_short |
A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
title_full |
A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
title_fullStr |
A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
title_full_unstemmed |
A Paleomagnetic Age Investigation of Pre-Salmon Springs Drift Pleistocene Deposits in the Southern Puget Lowland, Washington |
title_sort |
paleomagnetic age investigation of pre-salmon springs drift pleistocene deposits in the southern puget lowland, washington |
publisher |
Western CEDAR |
publishDate |
1983 |
url |
https://cedar.wwu.edu/wwuet/739 https://doi.org/10.25710/pab9-0c23 https://cedar.wwu.edu/context/wwuet/article/1761/viewcontent/Redacted_REDUCED___Roland_Thesis___Compiled___Permission_Inserted.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
WWU Graduate School Collection |
op_relation |
https://cedar.wwu.edu/wwuet/739 doi:10.25710/pab9-0c23 https://cedar.wwu.edu/context/wwuet/article/1761/viewcontent/Redacted_REDUCED___Roland_Thesis___Compiled___Permission_Inserted.pdf |
op_rights |
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission. |
op_doi |
https://doi.org/10.25710/pab9-0c23 |
_version_ |
1768388878655291392 |