Changes

During the [[Aptian]] (110 Ma; [[:file:St58OverviewFG28.JPG|Figure 4]]), deposition continued to be shallow-water marine along the north coast (Yaguajay* belt) with, farther to the north (Cayo Coco area) and as far as Oriente (Gibara area), some [http://www.merriam-webster.com/dictionary/pelagic pelagic] influence (Casablanca Group). Toward central and western Cuba, conditions continued to be pelagic. The pelagic and shallow-water conditions were separated by a [[Conglomerate|conglomeratic]] [[breccia]] zone (Sagua la Chica* belt) representing a [[forereef]] facies, although reefs themselves are not common in outcrops.

During the [[Aptian]] (110 Ma; [[:file:St58OverviewFG28.JPG|Figure 4]]), deposition continued to be shallow-water marine along the north coast (Yaguajay* belt) with, farther to the north (Cayo Coco area) and as far as Oriente (Gibara area), some [http://www.merriam-webster.com/dictionary/pelagic pelagic] influence (Casablanca Group). Toward central and western Cuba, conditions continued to be pelagic. The pelagic and shallow-water conditions were separated by a [[Conglomerate|conglomeratic]] [[breccia]] zone (Sagua la Chica* belt) representing a [[forereef]] facies, although reefs themselves are not common in outcrops.

There was an influx of quartz- and mica-rich [[Turbidite|turbiditic]] [http://dictionary.reference.com/browse/detrital detritus], possibly from the erosion of the previously formed basement high, which formed the La Esperanza, Polier, and Constancia* Formations. A southern Guajaibon–Sierra Azul carbonate bank may have been deposited.

There was an influx of [[quartz]]- and mica-rich [[Turbidite|turbiditic]] [http://dictionary.reference.com/browse/detrital detritus], possibly from the erosion of the previously formed basement high, which formed the La Esperanza, Polier, and Constancia* Formations. A southern Guajaibon–Sierra Azul carbonate bank may have been deposited.

Toward the south, the close of the Early Cretaceous was characterized by a great outpouring of [http://geology.com/rocks/basalt.shtml basaltic] flows (Matagua* Formation) over rifted basement. This activity was accompanied toward the north and west (Cifuentes*, southern Rosario, northern Rosario, and La Esperanza belts) by abundant and extensive [[chert]] deposits (Calabazar*, Carmita*, and Santa Teresa* Formations).

Toward the south, the close of the Early Cretaceous was characterized by a great outpouring of [http://geology.com/rocks/basalt.shtml basaltic] flows (Matagua* Formation) over rifted basement. This activity was accompanied toward the north and west (Cifuentes*, southern Rosario, northern Rosario, and La Esperanza belts) by abundant and extensive [[chert]] deposits (Calabazar*, Carmita*, and Santa Teresa* Formations).