Iscayachi Formation Explained
The Iscayachi Formation, in older literature also referred to as Guanacuno Formation, is an extensive Tremadocian geologic formation of western and southern Bolivia. The shales and sandstones were deposited in a shallow marine to pro-delta environment.[1] [2] [3] [4] [5] The formation reaches a thickness of 1000m (3,000feet).[1]
Fossil content
The formation has provided the following fossils:
- Akoldinoidia sinuosa[6]
- Altiplanelaspis palquiensis[7]
- Angelina hyeronimi, A. punctalineata[8]
- Asaphellus communis, A. riojanas
- Deltacare prosops
- Conophrys erquensis[9]
- Golasaphus palquiensis[7]
- Jujuyaspis keideli
- Kainella andina,[6] K. meridionalis
- Kvania lariensis
- Leptoplastides mariana
- Macrocystella bavarica
- Micragnostus hoeki
- Onychopyge branisai[10]
- Parabolinella argentinensis, P. boliviana
- Pharostomina alvarezi, P. trapezoidalis[11]
- Rhabdinopora flabelliformis
- Rhadinopleura incaica[10]
- Rossaspis rossi
- Saltaspis steinmanni[12]
- Shumardia erquensis
- Leptoplastides cf. granulosa[13]
- Altiplanelaspis sp.
- Araiopleura sp.
- Broeggeria sp.
- Ctenodonta sp.
- Dictyonema sp.
- Koldinioidia sp.
- Leiostegium sp.
- Nanorthis sp.
- Onychopyge sp.
- Palquiella sp.
- Parabolina sp.
- Saltaspis sp.
- Sphaerocare sp.
- Trilobitarum sp.
- Tropidodiscus sp.
See also
References
Bibliography
Further reading
- J. L. Benedetto. 2007. New Upper Cambrian-Tremadoc rhynchonelliformean brachiopods from northwestern Argentina: evolutionary trends and early diversification of plectorthoideans in the Andean Gondwana. Journal of Paleontology 81(2):261-285
- A. Pribyl and J. Vanek. 1980. Ordovician trilobites of Bolivia. Rozpravy Ceskoslovenske Akademie Ved. Rada Matematickych a Prirodnich Ved. Academia Praha, Prague, Czechoslovakia 90(2):1-90
- R. Suárez Soruco. 1976. El sistema ordovícico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123
Notes and References
- Suárez Riglos et al., 2018, p.37
- http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=8839 Quebrada de Rota
- http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=8837 Palqui
- http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=8804 Tres Cruces
- http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=74350 Iscayachi Formation
- Suárez Riglos et al., 2018, p.52
- Suárez Riglos et al., 2018, p.43
- Suárez Riglos et al., 2018, p.48
- Suárez Riglos et al., 2018, p.53
- Suárez Riglos et al., 2018, p.45
- Suárez Riglos et al., 2018, p.42
- Suárez Riglos et al., 2018, p.51
- Suárez Riglos et al., 2018, p.47
