4 



University of California. 



[Vol. t. 



merits in the book, the supposed metamorphic rocks proving to be 

 laminated volcanic flows. With so much misconception of the local 

 geology in so authoritative a book, it seemed desirable, since the 

 exposures were excellent, to look a little further into the geology of 

 the shores of the bay, to ascertain from personal observation what 

 the facts were. This was done during a second visit to the locality ; 

 and subsequently the continuation of the investigation was suggested 

 to Mr. Posada as a suitable subject for a thesis for graduation in the 

 College of Mining; and later both he and the writer made two ex- 

 tended visits to the district. The present paper embodies the results 

 of our joint observations. It does not profess to be an exhaustive 

 treatment of the subject, but simply to be a fuller account of the 

 geology of Carmelo Bay than has hitherto appeared. It will take 

 advantage of the observations of earlier writers, and will serve not 

 only to add to our knowledge of the geology of the coast but also 

 to correct some very misleading errors which have become current, 

 especially regarding the age of the granite and the alleged meta- 

 morphism of the Miocene. 



Besides the notice given by Whitney, which has been referred to 

 above, brief notes may be found in the writings of the earlier geolo- 

 gists, Trask* and Blake, f as well as in the more recent publications 

 of Becker.J 



PHYSIOGRAPHY AND RELIEF. 



Carmelo Bay is a small indentation of the coast, situated about 

 five miles south of Monterey Bay. It lies within two granite head- 

 lands, Pescadero Point on the north and Carmelo Point on the south, 



*Report on the Geology of the Coast Mountains, etc , by John B. Trask, 

 Assembly Journal, fifth session of the Legislature of the State of California, 

 1854, appendix doc. No. 9, pp. 21, 22, 36. Id. Sixth session, 1855, appendix 

 doc. 14, p. 28. 



f Reports of explorations and surveys for a railroad from the Mississippi 

 River to the Pacific Ocean, Vol. V House of Rep., 33d Congress, 2d Session, 

 ex. doc. No. 91, Geol. Report, by W. P. Blake, pp. 80-82, Washington, 1856. 

 Observations on the Physical Geography of the Mountain Ranges of California 

 adjoining the Coast, by W. P. Blake, in the Report of the Superintendent of the 

 Coast Survey for the year 1855, pp. 392, 393. 



} Notes on the Stratigraphy of California, Bulletin U. S. G. S. No. 19, p. 8. 

 Quicksilver Deposits of the Pacific Slope. Monograph U. S. G. S. No. XIII, 

 p. 185. 



