r 



130 GUIDEBOOK OF THE WESTERN ITNITEP STATES, 



sturdy native oak. The eucalyptus, a tall, slim tree that is 



un 



and is mucli used not 



only along the roadsides but as windbreaks. The pepper tree, which 

 has pendant plumose foliage, is highly ornamental and is largely used 



rks and gardens. But of all the 



bottom 



(Q 



Millbrae 



iwn 



Millbra ^^^^' ^^ ^^^ ^^°^* ^^ ^^^^ ^^^^ ^^^ ^^^ oyster bods of 



the Morgan Oyster Co. The native oyster is small 

 S^TS 457mues. ^^^ o^ coppery flavor, and although esteemed by epi- 

 cures for oyster cocktails is generally inferior to the 

 eastern oyster. Attempts to cstabhsh colonies of eastern oysters on 

 the Pacific coast have been unsuccessful. The young oj^sters, or 

 spat, however, are brought from the Atlantic seaboard and are 

 matured on the western coast. 



Ahead is San Bruno Mountain, beyond which hes San Francisco. 

 On the left are some parallel ridges running northwest. The nearest 

 is Buriburl Ridge (elevation 700 feet), composed of sandstones and 



Merced formation 



igneous rocks, whicli form the mass 



ocks 



Andrea; 



miles 



At San Bruno the raiboad branches. The main hne (a cut-off), 

 built only a few years ago and now used for the through traffic, bears 



San Bruno. *^ ^^® ^^^^* ^^^^^ *^^ ^^>' ^^°^^ around the east end 



Fw^fionioLt ^^ ^^^ Bruno Mountain and through five tunnels 



Elevation 19 feet, t , i * . • , rm • i -■ .r„ 



Los Angeles 459 nines, feachcs the statiou at Thu-d and Townsend streets 



in San Francisco. The old Ime bears to the left up 

 Merced Valley and around the west end of San Biimo Mountam and 



dist 



Peninsula 



ancisco 



trendmg Merced VaUey. Each of these parts is a block of the earth's 

 crust with a fault along its southwest side, upheaved along that side so 

 that It has a gentle slope to the northeast. Both fault blocks have 

 been much carved and worn by erosion so that their ori-mal blocklike 



m 



great part lost. Both are composed of pre-Ter- 

 tiary rocks, and the valley between them is fiUcd with the Merced 

 formation (Pliocene), covered for the most part by alluvium. The 

 fan t which hmits the San Bruno fault block on the southwest is con- 

 cealed by the aJluvium. North of San Bruno Mountain, between 

 It and the Golden Gate, is an irregular group of hills composed of 



