WOODWORTH: GEOLOGICAL EXPEDITION TO BRAZIL AND CHILE. 119 
Geological formations of Chile, mainly from Sundt. 
Pleistocene. Eolian and other deposits of Atacama on 
the north. 
Glacial till and gravels in the south. 
Eocene. Conglomerates and sandstones. 
Lignitic group of Coronel. 
Cretaceous. Sandstones of Quiriquifia Island, and 
along the coast. 
Conglomerates, sandstones, and_ black 
calcareous, fossiliferous shales of Co- 
quimbo and the Pequenes Range. 
Jurassic. 
Triassic Not recognized.. 
peesnview Devonian. Choapa. 
Metamorphic series; mica schists of 
Coastal Cordillera south of Caldera. 
Sub-Carboniferous or Fossiliferous beds at mouth of the Rio 
Devonian or older. 
The Andes consist of deformed, squeezed up, and dissected beds of - 
the Tertiary and older rocks, with eruptives. The Longitudinal 
Valley comprises Tertiary and possibly older beds overlain by lavas 
and Pleistocene gravels the preglacial members of which series appar- 
ently dip gently westward until cut off by the eastern fault of the 
Coastal Cordillera. The Coastal Cordillera, made up of the meta- 
morphic series and granite intrusions, is fringed by Cretaceous and 
Eocene deposits in faulted relations with the older terrane. 
The Coastal Cordillera forms a long narrow tableland parallel to the 
coast with an elevation from 1,200 to 1,500 feet, the flattish upper 
surface of which is evidently a peneplain from which more recent beds 
