Author: John Mason Clarke

Publisher: Rarebooksclub.com

Published: 2013-09

Total Pages: 24

ISBN-13: 9781230080215

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ... exposures as in the Lincoln gully and thence northward on the western slope of Canandaigua lake in scores of ravines and gullies and along the dugway roads ' as far north as Cheshire. They are also displayed in' the upper parts of all the gullies in Bristol Center southward to nearly the end of the valley and along Egypt brook and its various branches in South Bristol and also in the upper part of Jason gull. In the Honeoye lake valley the decreasing proportion of the arenaceous layers toward the west is noticeable, the shales becoming more calcareous and concretionary. The Briggs and Hamilton gullies near the west line of the map in the Honeoye valley afiord particularly favorable outcrops for study. Nearly all the Cashaqua shales are to be seen under specially favorable conditions along the Whetstone brook west of Honeoye village from the Livonia road to the falls at the Devil's Bedroom. Eastward of Naples they are found in Italy hollow at the mouth of the ravine Which crosses the road at the Big Tree schoolhouse. In the Middlesex valley they are well seen in the Clark and Mower gullies and also in the Lee; Goodrich and other small ravines farther north toward Middlesex Center. In fact in these high lands of the southern part of the map wherever the relatively thin drift mantle has been transected by streams these beds are brought to light. Rhinestreet black shale Black slaty shale with a small proportion of blue shale and oc casionally thin but lenticular sandstones. Thickness 18 feet on the eastern boundary of the quadrangle increasing to 30 feet at the western. This tendency to increase westward is manifested beyond the area of the map, for we find the bed to be continuous from here to Lake Erie, where its thickness is...