Hydrogeochemical Processes In Glacial Deposits In Northeastern Ohio

Author : Bridget P. Ring
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (881 download)

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Download or read book Origin and Extent of Lacustrine Deposits in the Grand River Valley, Northeastern Ohio written by Bridget P. Ring and published by . This book was released on 2013 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two proglacial lakes, Rock Creek Lake and Grand River Lake, have been mapped in northeastern Ohio. These lakes existed in the Grand River valley, a low-lying area in Ashtabula and Trumbull counties. This study reexamined the extent of these late glacial lakes and determined their history. Several maps were analyzed to compare and contrast the mapped extent of the late-glacial lakes. Digital Elevations Models (DEM) and soil surveys were used to make updated maps of the study area. Terraces above the western arm of the Grand River were highlighted by DEMs to link the drainage of Grand River Lake to ancestors of Lake Erie. Water-well logs were examined to create cross sections across the Grand River valley to estimate the stratigraphy and thickness of lacustrine deposits. Two sediment cores were taken from the Grand River valley and textural, carbonate and clay mineralogy analyses were performed. A soils parent materials map created from soil surveys suggests that the extents of both Rock Creek Lake and Grand River Lake were smaller than previously mapped, as the distribution of lacustrine-derived soils differs from where the lakes had been mapped. Stratigraphy from water-well logs confirmed the presence of thick lacustrine deposits within the Grand River valley. The sediment cores were predominately clay and displayed similar carbonate contents to either the Hiram or Ashtabula tills found in the surrounding uplands. Rock Creek Lake possibly existed only as a small lake at 280 m (920 ft) or higher near the ice margin in the southern portion of the Grand River valley. The drainage outlet for Rock Creek Lake may have been through the Defiance Moraine along the modern course of the upper Grand River if a drainage divide at 290 m (950 ft) was crossed temporarily. Grand River Lake stabilized in the Grand River valley at 250 m (820 ft) and thick lacustrine deposits may have been deposited during its existence. A possible drainage outlet for Grand River Lake was westward along the Ashtabula Morainic Complex. The lake probably drained into an ancestor of Lake Erie older than the Whittlsey level because three levels of terraces were found above the western arm of the Grand River and may correlate to Lake Warren I, III and Lake Arkona. The possible drainage outlets for early phases of Grand River Lake when ice extended further south are problematic.