Sea level changes through the Jurassic/Cretaceous boundary in western Cuba indicated by taphonomic analysis
The taphonomical and microfacies analyses of the Guasasa Formation in the San Vicente section of western Cuba, allowed the recognition of regional sea level fluctuations through the Jurassic/Cretaceous transition. Four discrete taphofacies associated with different depositional conditions were characterized through the section. The paleoecological conditions reconstruction indicates that the site of deposition changed from a shallow water carbonate bank recognizable at the base of the section (late Tithonian facies of the San Vicente Member) into a deep-water basinal environment at its top through the Berriasian, as facies of the overlying El Americano member. This continuous deepening of the basin was interrupted only by a short-term sea level drop close to the Jurassic/Cretaceous boundary.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Sociedad Geológica Mexicana A.C.
2014
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| Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-33222014000300002 |
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| Summary: | The taphonomical and microfacies analyses of the Guasasa Formation in the San Vicente section of western Cuba, allowed the recognition of regional sea level fluctuations through the Jurassic/Cretaceous transition. Four discrete taphofacies associated with different depositional conditions were characterized through the section. The paleoecological conditions reconstruction indicates that the site of deposition changed from a shallow water carbonate bank recognizable at the base of the section (late Tithonian facies of the San Vicente Member) into a deep-water basinal environment at its top through the Berriasian, as facies of the overlying El Americano member. This continuous deepening of the basin was interrupted only by a short-term sea level drop close to the Jurassic/Cretaceous boundary. |
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