FA UNA OF DE VONIA N FORMA TION A T MIL WA UKEE 273 



berof points. One of these, at a point very near the place where 

 the shaft was finally sunk, revealed the following section, as 

 shown by the records of the City Engineer's office. At the 

 depth of forty two feet below water level, black shale was found, 

 underlying strata of sand, gravel, and red and blue clay ; at 

 fifty seven feet, "soapstone;" at ninety seven feet, cement 

 rock; at one hundred and seven feet, "soapstone" again; at 

 one hundred and thirty-eight feet, "brownstone and lime rock." 

 The "brownstone and lime rock" was not penetrated to any 

 depth and it is not possible, perhaps, to assert positively what 

 it was ; but it is believed to be the same as the Lower Helderberg 

 rock underlying the cement rock on the river. 



The material taken from the new intake shaft and tunnel was 

 dumped indiscriminately upon the beach. It has since been 

 spread out, covered with soil, planted with grass and trees and 

 made into a park. It was impossible, for the most part, to sort 

 out the different components of the mass, or to determine except 

 in a general way their original order of superposition. Cement 

 rock and " soapstone" were mingled with each other and are 

 alike disintegrating and turning to clay. The "soapstone " is 

 a lumpy, nodular shale of a greenish-gray color, soft, when wet, 

 hardening into something very like rock when dry, and turning 

 very rapidly to clay under exposure to the rain and air. It 

 strongly resembles some layers of the cement quarry rock, whose 

 lowest and highest layers possess much the same qualities. 

 Portions of the soapstone carry fossils in an excellent state of 

 preservation, of the same species, for the most part, as those 

 found at the quarry on the river. Mixed in with the "soap- 

 stone " are very hard layers, from one to four inches in thickness, 

 largely composed of shells of Ownetes scituhts Hall, of a gibbous 

 form, associated with Te?itaculites belluhis Hall. The same form 

 of Cho?ietes is also found amid the softer material in the dump 

 and in the lower division of the quarry. The Tentaculites is also 

 found at the cement quarry, but not so abundantly. A distinctly 

 flatter variety of the same species of Chotietes is found in other 

 portions of the "soapstone," and in the upper layers of the quarry. 



