Resumen
The late Triassic bivalve Monotis (Pacimonolis) aft. subcircularis Gabb indicative of a Norian (probably early late Norian) age has been collected from the southeastern end of Patranca Island (45°25'S-74°09'W) in the Chonos Archipelago, Southern Chile. Another fossil bivalve, Limidae gen. et sp. indet. has been collected from a small unnamed island (45°25'S-74° 10'W) 4 km to the north, and indicates a maximum Early Carboniferous, probably Mesozoic age. The fossil bearing unit is the Potranca Formation (or Potranca Unit) which forms part of the Chonos Metamorphic Complex, interpreted as a subduction complex developed on the southwestern margin of Gondwanaland. As these rocks have been previously considered to be of Paleozoic age (Late Silurian-Early Devonian), the geologic history of this part of the continental margin must be reinterpreted. These fossils provide clear evidence that marine depositional processes persisted within the Chonos Metamorphic Complex during Late Triassic time.
| Idioma original | English |
|---|---|
| Páginas (desde-hasta) | 165-173 |
| Número de páginas | 9 |
| Publicación | Revista Geologica de Chile |
| Volumen | 25 |
| N.º | 2 |
| Estado | Published - 1998 |
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ASJC Scopus subject areas
- Geology
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Discovery of Late Triassic fossils in the Chonos Metamorphic Complex, Southern Chile. / Fang, Zonq Jie; Boucot, Arthur; Covacevich, Vladimir; Hervé, Francisco.
En: Revista Geologica de Chile, Vol. 25, N.º 2, 1998, p. 165-173.Resultado de la investigación: Article
TY - JOUR
T1 - Discovery of Late Triassic fossils in the Chonos Metamorphic Complex, Southern Chile
AU - Fang, Zonq Jie
AU - Boucot, Arthur
AU - Covacevich, Vladimir
AU - Hervé, Francisco
PY - 1998
Y1 - 1998
N2 - The late Triassic bivalve Monotis (Pacimonolis) aft. subcircularis Gabb indicative of a Norian (probably early late Norian) age has been collected from the southeastern end of Patranca Island (45°25'S-74°09'W) in the Chonos Archipelago, Southern Chile. Another fossil bivalve, Limidae gen. et sp. indet. has been collected from a small unnamed island (45°25'S-74° 10'W) 4 km to the north, and indicates a maximum Early Carboniferous, probably Mesozoic age. The fossil bearing unit is the Potranca Formation (or Potranca Unit) which forms part of the Chonos Metamorphic Complex, interpreted as a subduction complex developed on the southwestern margin of Gondwanaland. As these rocks have been previously considered to be of Paleozoic age (Late Silurian-Early Devonian), the geologic history of this part of the continental margin must be reinterpreted. These fossils provide clear evidence that marine depositional processes persisted within the Chonos Metamorphic Complex during Late Triassic time.
AB - The late Triassic bivalve Monotis (Pacimonolis) aft. subcircularis Gabb indicative of a Norian (probably early late Norian) age has been collected from the southeastern end of Patranca Island (45°25'S-74°09'W) in the Chonos Archipelago, Southern Chile. Another fossil bivalve, Limidae gen. et sp. indet. has been collected from a small unnamed island (45°25'S-74° 10'W) 4 km to the north, and indicates a maximum Early Carboniferous, probably Mesozoic age. The fossil bearing unit is the Potranca Formation (or Potranca Unit) which forms part of the Chonos Metamorphic Complex, interpreted as a subduction complex developed on the southwestern margin of Gondwanaland. As these rocks have been previously considered to be of Paleozoic age (Late Silurian-Early Devonian), the geologic history of this part of the continental margin must be reinterpreted. These fossils provide clear evidence that marine depositional processes persisted within the Chonos Metamorphic Complex during Late Triassic time.
KW - Chile
KW - Chonos metamorphic complex
KW - Fossils
KW - Palaeontology
KW - Triassic
UR - http://www.scopus.com/inward/record.url?scp=0032232839&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032232839
VL - 25
SP - 165
EP - 173
JO - Andean Geology
JF - Andean Geology
SN - 0718-7092
IS - 2
ER -