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SOUTH AMERICAN GEOLOGY 
Summary of arguments for greater former extent of South America: 
Triassic and Permian continental deposits. 
Permian glaciation. 
Absence of early Paleozoic and Mississippian sediments. 
Derivation of Paleozoic sediments. 
Areas of supposed ancient crystallines along West Coast. 
Passage from limestones to littoral Carbonic deposits as Pacific coast 
is reached in Peru. 
Down-faulted origin of the Peruvian and Chilean deeps. 
Overwhelming evidence of adjustment still taking place (seismological). 
No marine pre-Mesozoic deposits on the West Coast. 
Atlantic character of the Andean Mesozoic transgression. 
Lack of community between the Peruvian and Chilean marine Miocene 
formations. 
Evidence of coastal subsidence from Rio southward on the East Coast, 
and from Concepcion southward on the West Coast. 
