Report on the Geology and Topography of a Portion of the Lake Superior Land District in the State of Michigan Volume 2 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1851 Excerpt: ...beds of No. 6, and the yielding strata of No. 7, protecting them from erosion. It presents a series of mural fronts along the bay, facing the north-west, while its surface declines gently with the dip towards Lake Michigan, exactly in the same manner as the Trenton does towards the bay. For the particulars of the dip and thickness of these formations, the reader is referred to another portion of this chapter, where I have discussed this subject, embracing all the rocks of the north and west shore of Lake Michigan. a. a. Red Clay and Drift.--As above remarked, there are, on the lint of the section between the Wolf river and Green Bay, extensive deposits of northern drift. The drift hills about the head of the Oconto and around Shawanse lake, are discussed in the report on Wisconsin. From the falls of Wolf river, southerly, beds of red clay occur, interstratified with the coarse drift: they become more heavy and numerous, as we proceed towards Green Bay, until, at Appleton, the red clay constitutes the mass of the superficial deposits. It is there about one hundred feet thick, and rests on the Trenton limestone (No. 4), as at Navarino. AS this place, it passes beneath the surface of the waters of Green Bay; and here are sunk the wells, of which the details of the borings will be found in the Appendix. Passing over the crest formed by the Niagara limestone at Lake Winnebago, the same clay and drift beds continue most of the way to Sheboygan. Their thickness is very considerable, but their extent' on the line of this section is not know. At Green Bay, as at Lake Winnebago, it occurs in patches, filling the depressions in the stratified rocks, at various elevations from the level of the water to the top of the bluff. From Sheboygan, I have traced it to the south...