Ammonite biostratigraphy and bioevents in the Jurassic e Cretaceous boundary of central Chile
| dc.contributor.author | Salazar, Christian | |
| dc.contributor.author | Stinnesbeck, Wolfgang | |
| dc.contributor.author | Alvarez, Miguel | |
| dc.date.accessioned | 2020-09-02T21:07:13Z | |
| dc.date.available | 2020-09-02T21:07:13Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Ammonites are abundant and well preserved in the Tithonian-Valanginian (Upper Jurassic eLowerCretaceous) sedimentary successions of the central Chilean Andes, known as the Lo Valdes and Ba~nos delFlaco Formations. A total of 1429 ammonites were collected from these stratigraphic units and thefollowing index zones based on ammonites are here proposed, from base to top: Virgatosphinctes mex-icanus/Pseudolissoceras cf. zitteli,Windhauseniceras internispinosum,Micracanthoceras microcanthum/Corongoceras alternans,Substeueroceras koeneni (Berriasella fraudans and Groebericeras rocardi sub-zones)and Thurmanniceras thurmanni/Argentiniceras fasciculatum.Our analyses indicate that “Ammonite Richness”is high in the middle and upper Tithonian and intothe lower Berriasian part of the succession, but decreases towards the lower Valanginian. Highest sim-ilarity values are established for the upper Tithonian, coincident with a high diversity; similarity declinesin the lower Berriasian. The main faunal turnover occurred between the early and late Berriasian fol-lowed by a secondary bioevent between the late Berriasian and early Valanginian | es |
| dc.format.extent | 16 p. | es |
| dc.identifier.citation | Cretaceous Research 107 (2020) | es |
| dc.identifier.uri | DOI: 10.1016/j.cretres.2019.104282 | es |
| dc.identifier.uri | http://hdl.handle.net/11447/3393 | |
| dc.language.iso | en | es |
| dc.subject | Ammonite biostratigraphy | es |
| dc.subject | Bioevent analysis | es |
| dc.subject | Lo Valdés Formation | es |
| dc.subject | Formation South America | es |
| dc.subject | Baños del Flaco Formation | es |
| dc.subject | South America | es |
| dc.title | Ammonite biostratigraphy and bioevents in the Jurassic e Cretaceous boundary of central Chile | es |
| dc.type | Article | es |