20 Sources of Materials. 



in the neighboring bays, are covered in the 

 sand and mud deposits in which they once 

 lived. Among the most frequently occurring 

 of these were Schizotherus, our large blue 

 clam, Saxidomus Nutali and Mya Truncata. 

 This Mya does not inhabit our waters now, 

 but is found in Alaska scarcely distinguishable 

 from the fossil one of the elevated beach. 

 Here would seem to be conclusive evidence 

 that during the geological horizon to which 

 these shells belong the Pacific ocean buried 

 them along its beach line two hundred and 

 ten feet above its present reach. 



A similar raised beach may be seen near 

 the mouth of the Coquelle river on the hill 

 above the town of Bandon. Here the number 

 and variety of shells found were still greater, 

 but at a less elevation. Schizotherus, Saxi- 

 domus and Mya, like those of Cape Blanco, 

 were found in an elevated beach one hundred 

 feet above present waters, and so entirely un- 

 divvturbed as to leave no doubt as to their 

 having been deposited there by the ocean. 



