The Tectonic and Geological Environment of Coastal South America
7
.·
10
BASIN
+s
20°
CHILE
J:
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2
BASIN
Ul
a:
.....
..,
PLATE
,r
30°
. {
1
PLATE
Fig. 2. Regional tectonic features of the Nazca plate and major neotectonic structures of
the Andean margin (modified from Greene and Wong 1989; Dewey and Lamb 1992; Kellogg and Vega 1995). Solid triangles locate active volcanoes. Plus signs indicate active
uplift of coastal areas; minus signs indicate active subsidence of coastline (Gonzalez-Ferran 1985). Arrow denotes relative motion of the Nazca and South American plates
(em year- 1 ) . White areas denote high ground in the Andes (over 2000 m a. s .I.)
7
.·
10
BASIN
+s
20°
CHILE
J:
()
2
BASIN
Ul
a:
.....
..,
PLATE
,r
30°
. {
1
PLATE
Fig. 2. Regional tectonic features of the Nazca plate and major neotectonic structures of
the Andean margin (modified from Greene and Wong 1989; Dewey and Lamb 1992; Kellogg and Vega 1995). Solid triangles locate active volcanoes. Plus signs indicate active
uplift of coastal areas; minus signs indicate active subsidence of coastline (Gonzalez-Ferran 1985). Arrow denotes relative motion of the Nazca and South American plates
(em year- 1 ) . White areas denote high ground in the Andes (over 2000 m a. s .I.)