The Tectonic and Geological Environment of Coastal South America
13
ing ocean circulation patterns and perhaps the world's climate, and uplifted the Eastern Cordillera of Colombia. The coastal range (Serrania de
Baudo) was accreted to the South American continental margin.
In mid-Miocene time most of the present Central and North Andes
developed (e.g., Kroonenberg et al. 1990; Hoorn et al. 1995). Late Miocene
deposits in the Magdalena Valley between the Eastern and Central Cordilleras of Colombia demonstrate a Late Miocene age for the Magdalena River
(Dengo and Covey 1993). The paleo-Magdalena, and its principal tributary,
the paleo-Cauca, both developed in tectonic lows as the Eastern and Central Cordilleras were uplifted, interrupting and severing the earlier foreland basin. This Mid-Miocene event completely disrupted earlier westward
and northwestward drainage from the Guyana and Brazilian Shields. North
of Colombia, sediments eroded from the uplifted Central and Eastern Cordilleras were deposited in the Cauca and Magdalena fans.
References
Allmendinger RW, Jordan TE, Kay SM, !sacks BL (1997) The evolution of the AltiplanoPuna Plateau of the Central Andes. Annu Rev Earth Planet Sci 25:139-17 4
Asmus HE, Baisch PR ( 1983) Geological evolution of the Brazilian continental margin.
Episodes 4:3-9
Asmus HE, Ponte FC (1973) The Brazilian marginal basins. In: Nairn AEM, Stehili FG
(eds) The ocean basins and margins, vol 1. The South Atlantic. Plenum Press, New
York, pp 87-133
Barazangi M, !sacks B (1976) Spatial distribution of earthquakes and subduction of the
Nazca plate beneath South America. Geology 4:686-692
Bourgois J, Calle B, Tournon J, Toussaint J-F (1982) The Andean ophiolitic megastructures on the Buga-Buenaventura transverse (Western Cordillera-Valle Colombia).
Tectonophysics 82:207-299
Bowin C (1976) Caribbean gravity field and plate tectonics. Geol Soc Am Spec Pap 169
Cande SC, Leslie RB ( 1986) Late Cenozoic tectonics of the southern Chile trench. J Geophys Res 91(B1):471-496
Case JE (1974) Oceanic crust forms basement of eastern Panama. Geol Soc Am Bull
85:645-652
Chang HK, Kowsmann RO, Figueiredo AMF, Bender A ( 1992) Tectonics and stratigraphy
of the East Brazil Rift System: an overview. Tectonophysics 213:97- 138
Cobbold PR, Szatmari P, Demercian LS, Coelho D, Rossello EA (1995) Seismic experimental evidence for thin-skinned horizontal shortening by convergent radial gliding
on evaporites, deep-water Santos Basin. In: Jackson MPA, Roberts RG, Snelson S (eds)
Salt tectonics: a global perspective. AAPG Mem 6:305-321
de Almeida LFG (1974) A drenagem festonada e seu significado fotogeologico. Sociedade Brasileiro de Geologia. Anais de 38th Congresso, Porto Alegre, RS, 7:175-197
Demercian LS, Szatmari P, Cobbold PR (1993) Style and pattern of salt diapirs due to
thin-skinned gravitational gliding, Campos and Santos basins, offshore Brazil. Tectonophysics 228:393-433
13
ing ocean circulation patterns and perhaps the world's climate, and uplifted the Eastern Cordillera of Colombia. The coastal range (Serrania de
Baudo) was accreted to the South American continental margin.
In mid-Miocene time most of the present Central and North Andes
developed (e.g., Kroonenberg et al. 1990; Hoorn et al. 1995). Late Miocene
deposits in the Magdalena Valley between the Eastern and Central Cordilleras of Colombia demonstrate a Late Miocene age for the Magdalena River
(Dengo and Covey 1993). The paleo-Magdalena, and its principal tributary,
the paleo-Cauca, both developed in tectonic lows as the Eastern and Central Cordilleras were uplifted, interrupting and severing the earlier foreland basin. This Mid-Miocene event completely disrupted earlier westward
and northwestward drainage from the Guyana and Brazilian Shields. North
of Colombia, sediments eroded from the uplifted Central and Eastern Cordilleras were deposited in the Cauca and Magdalena fans.
References
Allmendinger RW, Jordan TE, Kay SM, !sacks BL (1997) The evolution of the AltiplanoPuna Plateau of the Central Andes. Annu Rev Earth Planet Sci 25:139-17 4
Asmus HE, Baisch PR ( 1983) Geological evolution of the Brazilian continental margin.
Episodes 4:3-9
Asmus HE, Ponte FC (1973) The Brazilian marginal basins. In: Nairn AEM, Stehili FG
(eds) The ocean basins and margins, vol 1. The South Atlantic. Plenum Press, New
York, pp 87-133
Barazangi M, !sacks B (1976) Spatial distribution of earthquakes and subduction of the
Nazca plate beneath South America. Geology 4:686-692
Bourgois J, Calle B, Tournon J, Toussaint J-F (1982) The Andean ophiolitic megastructures on the Buga-Buenaventura transverse (Western Cordillera-Valle Colombia).
Tectonophysics 82:207-299
Bowin C (1976) Caribbean gravity field and plate tectonics. Geol Soc Am Spec Pap 169
Cande SC, Leslie RB ( 1986) Late Cenozoic tectonics of the southern Chile trench. J Geophys Res 91(B1):471-496
Case JE (1974) Oceanic crust forms basement of eastern Panama. Geol Soc Am Bull
85:645-652
Chang HK, Kowsmann RO, Figueiredo AMF, Bender A ( 1992) Tectonics and stratigraphy
of the East Brazil Rift System: an overview. Tectonophysics 213:97- 138
Cobbold PR, Szatmari P, Demercian LS, Coelho D, Rossello EA (1995) Seismic experimental evidence for thin-skinned horizontal shortening by convergent radial gliding
on evaporites, deep-water Santos Basin. In: Jackson MPA, Roberts RG, Snelson S (eds)
Salt tectonics: a global perspective. AAPG Mem 6:305-321
de Almeida LFG (1974) A drenagem festonada e seu significado fotogeologico. Sociedade Brasileiro de Geologia. Anais de 38th Congresso, Porto Alegre, RS, 7:175-197
Demercian LS, Szatmari P, Cobbold PR (1993) Style and pattern of salt diapirs due to
thin-skinned gravitational gliding, Campos and Santos basins, offshore Brazil. Tectonophysics 228:393-433