Lawson.] 



Geology of Carmelo Bay. 



2 I 



The easterly limit of these sandstones and conglomerates is not 

 less interesting than that at Pescadero Point. Here on the north- 

 west side of Sunium Point the conglomerates are in sharply-defined 

 contact with the Sunium Point mass of carmeloi'te. The plane of 

 contact is vertical, or nearly so, and the eruptive character of the 

 massive rock is very evident, there being considerable masses of 

 the conglomerate inclosed in it in the immediate vicinity of the 

 junction of the two formations. Back from the shore of the bay 

 the strata are covered by the terrace formations for the most part, 

 and by soil, so that the extent of the area occupied by these rocks 

 to the northward cannot be mapped with the same precision as in 

 the case of the basin on Carmelo Point. The series here, however, 

 probably occupies a similarly limited structural trough or basin, 

 since the underlying granite is well exposed all the way around the 

 coast from Pescadero Point to the town of Monterey, and the only 

 direction in which it might extend is to the eastward beneath the 

 shales of the Monterey series; and in this direction occur masses of 

 eruptive rocks. 



The third occurrence of the Carmelo series within the area under 

 examination is at the junction of the main coast road with the short 

 branch road which leads westerly to the Mission church. Here we 

 have the same alternation of sandstones and conglomerates exposed 

 in a cutting of the road for several hundred feet. The strata are 

 reposing upon a projecting knob of the Santa Lucia granite. The 

 rocks are dipping away from the granite westerly at angles which 

 vary from 20° to 47 , and show evidence of differential movement 

 near the contact, due to the disturbance which caused them to 

 assume such steep attitudes. They could only have assumed this 

 steep dip away from the granite by a relative shearing along the 

 contact of the massive and the bedded terranes. The relation of 

 the sandstone and conglomerates to the granite is illustrated in 

 section B-B', Plate 1. The pebbles of the conglomerates here 

 exhibit the same cracked appearance as at Carmelo Point, though 

 to a much less marked degree. 



Correlation. — No fossils have been found as yet in the rocks of 

 this series; and in view of the unconformable relation of the series 

 to the rocks both above and below, its precise correlation must for 



