Asset Details
Do you wish to reserve the book?
PLIOCENE OSTRACODA OF THE SALINE BASIN, VERACRUZ, MEXICO (PALEOECOLOGY, TERTIARY, GULF)
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
PLIOCENE OSTRACODA OF THE SALINE BASIN, VERACRUZ, MEXICO (PALEOECOLOGY, TERTIARY, GULF)
Do you wish to request the book?
PLIOCENE OSTRACODA OF THE SALINE BASIN, VERACRUZ, MEXICO (PALEOECOLOGY, TERTIARY, GULF)
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Dissertation
PLIOCENE OSTRACODA OF THE SALINE BASIN, VERACRUZ, MEXICO (PALEOECOLOGY, TERTIARY, GULF)
1985
Overview
A detailed systematic study of samples from the Pliocene of the Saline Basin, Veracruz, Mexico, shows characteristic ostracode assemblages fro the Encanto, Lower and Upper Concepcion, and Agueguexquite strata. The remaining units, Filisola, Paraje Solo and Cedral, did not contain ostracodes. Ninety species belonging to 53 genera are determined and described. The ostracode assemblages of the studied units indicate a general upward shallowing trend during the Pliocene. The Encanto strata, constituting the oldest unit (N 19 or upper N 18), are characterized by Ambocythere spp., Argilloecia posterotruncata Bold, Bradleya normani (Brady), Krithe trinidadensis Bold, and Parakrithe spp. indicating a middle to upper bathyal environment. The Lower and Upper Concepcion beds (N 20) can be recognized by the presence of Actinocythereis vineyardensis (Cushman), Touroconcha lapidiscola Hartmann and the abundance of Hulingsina sp. 1, Henryhowella ex. gr. asperrima (Reuss) and Puriana spp. Encanto species persisting in the Lower Concepcion beds indicate an upper bathyal to outer neritic environment. The Upper Concepcion beds lack these species but instead possess abundant Cyprideis and Perissocytheridea spp., Basslerites? sp., Cytherura wardensis Howe and Brown and Loxoconcha sp. A Hazel. This assemblage indicates an outer to middle shelf environment. The Filisola and Paraje Solo samples were barren of ostracodes. Their foraminiferal and molluscan fauna indicates nearshore and brackish environments. The Paraje Solo may be in part contemporaneous to the Agueguexquite. The Agueguexquite strata contain the youngest (middle N 20), most abundant, and diverse fauna, indicating an inner neritic environment of deposition. They represent a local marine transgression of short duration in the northern part of the basin. By upper Agueguexquite time brackish and continental conditions had returned. A Q-mode cluster analysis utilizing Ward's method on species proportions divided the Agueguexquite and Upper Concepcion samples in two main clusters, each one subdivided into two groups representing slightly different environments. Because of their low abundance only one Encanto and 3 Lower Concepcion samples were used in the clustering. They form generally independent groups. No apparent diversity trends were found.
