Lawson.1 Geology of Carmelo Bay. 45 



facies of the rock are overmanned in the vicinity of Sunium Point 

 by the lower (/. e., newer) terrace formations. 



At the ravine area the only relation which can be satisfactorily 

 established is the unconformable superposition of the terrace forma- 

 tions upon the lava, fragments of the lava being found in the sand- 

 stone. Stratigraphical considerations, however, render it highly 

 probable that the lava of the ravine area is above the shales of 

 the Monterey series. A fact of considerable interest is very appar- 

 ent in the ravine section. The lava is seen to have been sharply 

 faulted, and the superposition of the terrace sandstone upon the lava 

 shows clearly, as appears in the accompanying diagram, Fig. 3, that 

 this faulting has occurred subsequent to the deposition of the terrace 

 formations. 



Figure 3. — Section on carriage drive in the ravine, showing terrace formations 

 reposing upon carmeloite lava, and both faulted; c, carmeloite; 

 /, terrace formations; f, fault. Scale 60 feet=one inch. 



At Abalone Point the carmeloite lava is in sharp contact 

 towards the west with the Santa Lucia granite. So much secondary 

 decomposition has taken place along the zone of contact that it is 

 difficult to determine whether the contact is due to faulting or is of 

 an intrusive character. It was our opinion in the field that the 

 phenomena appeared to be rather those of faulting than of intrusion. 

 The supposition of the intrusive character of the contact is negatived 

 by the lava-like character of the carmeloite close up to the granite, 

 and by the presence of agglomerates and breccias interbedded with 

 the lava. The relative age of the carmeloite and granite is directly 

 established by the occurrence of rounded bowlders of the latter im- 

 bedded in the lava. 



No contacts of the eruptive masses with older rocks are observ- 

 able at the lagoon area or at the mission area. 



Thus far the age of the eruptive rocks has only been roughly 

 limited to the following extent: I. They are later than the Carmelo 



