130 JOURNAL AND PROCEEDINGS 



Notes On The Late Collecting Season. 



Read before the Hamilton Scientific Association, 

 November 30th, 1906. 



BY COL. C. C. GRANT. 



In a recent paper the writer referred to the discovery, by 

 the late Mr. A. E. Walker, of the tail shield of a lower 

 Silurian Trilobite '' Asaphus platycephalus" obtained from a 

 piece of shingle embedded in "Erie (glacial) clay," below the 

 Ancient Lake Iroquois Beach, of Dr. Spencer, which is 

 known to us now as the Burlington Heights. 



My old friend and fellow-worker, for many years an 

 ex-president of the Geological Section of the Hamilton 

 Scientific Association, unquestionably was opposed to some 

 of the views put forth in our early publications by members 

 who took considerable interest in the Field Geology of the 

 District. He was unable to see how Trenton fossils, not 

 common to the Hudson River series also, could ever have 

 been derived from the bed of the lake, the land adjacent, or 

 the Great River which, Dr. Spencer asserts, carried the 

 surplus waters of Lake Erie through the Dundas Valley. 

 No doubt many of our Hudson River fossils obtained from 

 the modern mis-called Beach, its more ancient predecessor 

 and the lake shore, originated in the exposure of rock 

 surfaces laid bare by river streams, or the washing of the 

 lake against its land barriers. 



The writer noticed, during the past few summers, the 

 extraordinary number of mottled red and white Clinton slabs 

 (sandstones) scattered along the lake shore between Winona 

 and Grimsby. They are from the same horizon as the 

 Hamilton Iron-band, greatly as they differ in appearance. 

 The Grimsby rivulet probably transported them to the lake, 



