Earth:Quebrada Marquesa Formation
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| Quebrada Marquesa Formation Stratigraphic range: Barremian-Albian | |
|---|---|
| Type | Geological formation |
| Overlies | Arqueros Formation |
| Thickness | 1500 m |
| Lithology | |
| Primary | Porphyritic andesite, tuff, limestone, volcanic sandstone, calcareous sandstone |
| Other | Conglomerate, manganese deposits |
| Location | |
| Coordinates | [ ⚑ ] : 24°1′51.70″S 68°11′44.79″W / 24.031028°S 68.195775°W |
| Region | Coquimbo Region |
| Country | Chile |
  Quebrada Marquesa Formation (Chile) | |
Quebrada Marquesa Formation (Spanish: Formación Quebrada Marquesa) is a geological formation composed of alternations of volcanic and volcaniclastic rock layers and mostly continental (as opposed to marine) sedimanry rocks in inland Coquimbo Region, northern Chile.[1] Its does however have a few layers of marine sedimentary rock near its base.[1] It overlies the older Arqueros Formation wth which it has some interdigitation.[2] Quebrada Marquesa Formation contains economically valuable manganese layers in its upper half.[2][3] The formation has a stratigraphic thickness of about 1500 m.[4]
References
- ↑ 1.0 1.1 Aguirre & Mehech 1964, p. 433.
- ↑ 2.0 2.1 Aguirre & Mehech 1964, p. 429.
- ↑ Aguirre & Mehech 1964, p. 431.
- ↑ Oyarzun et al. 1998, p. 549.
- Bibliography
- Aguirre, Luis; Mehech, Sonia (1964). "Stratigraphy and Mineralogy of the Manganese Sedimentary Deposits of Coquimbo Province, Chile". Economic Geology 59 (3): 428–442. doi:10.2113/gsecongeo.59.3.428. Bibcode: 1964EcGeo..59..428A. https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=30a883aec2e794a5f50da56da19cb7cba09b39a3.
- Oyarzun, R.; Ortega, L.; Sierra, J.; Lunar, R.; Oyarzun, J. (1998). "Cu, Mn, and Ag mineralization in the Quebrada Marquesa Quadrangle, Chile: the Talcuna and Arqueros districts". Mineralium Deposita 33 (6): 547–559. doi:10.1007/s001260050171. Bibcode: 1998MinDe..33..547O. https://docta.ucm.es/rest/api/core/bitstreams/aafc094d-8450-42a8-a54e-7db11df07aca/content.
Template:Sedimentary formations and groups in Chile
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