Changes

Except for the Yaguajay* belt along the north coast where platform carbonates accumulated, deep-water [http://www.merriam-webster.com/dictionary/pelagic pelagic] deposition continued during the [[Albian]] to [[Cenomanian]] (93 Ma; [[:file:St58OverviewFG29.JPG|Figure 9]]). In the south, volcanic activity contributed silica to the seawater, which led to the deposition of primary radiolarian [[chert]]s (Calabazar*, Carmita, and Santa Teresa) below the carbonate compensation depth. Whereas noncalcareous detritus was absent over most of the northern area, volcanic-derived clays became increasingly abundant toward the south (Santa Teresa* Formation). The Rana granodiorite high was still active, providing material for the Chaco Azul Formation. The position of the Vinas* type carbonates of the Guajaibon–Sierra Azul belt is problematic.

Except for the Yaguajay* belt along the north coast where platform carbonates accumulated, deep-water [http://www.merriam-webster.com/dictionary/pelagic pelagic] deposition continued during the [[Albian]] to [[Cenomanian]] (93 Ma; [[:file:St58OverviewFG29.JPG|Figure 9]]). In the south, volcanic activity contributed silica to the seawater, which led to the deposition of primary radiolarian [[chert]]s (Calabazar*, Carmita, and Santa Teresa) below the carbonate compensation depth. Whereas noncalcareous detritus was absent over most of the northern area, volcanic-derived clays became increasingly abundant toward the south (Santa Teresa* Formation). The Rana granodiorite high was still active, providing material for the Chaco Azul Formation. The position of the Vinas* type carbonates of the Guajaibon–Sierra Azul belt is problematic.

To the north, as during the Aptian–Albian, the shallow carbonate banks continued to be separated from the pelagic, deep-water sediments to the south by a zone of carbonate-derived clastics, which shifted progressively southward; carbonate [[turbidite]]s became increasingly abundant (Calabazar* and Mata* formations). In the Florida Straits, carbonate deposition did not keep up with subsidence as indicated by the increase in pelagic deposits, including chert (upper Casablanca Group).

To the north, as during the Aptian–Albian, the shallow carbonate banks continued to be separated from the pelagic, deep-water sediments to the south by a zone of carbonate-derived clastics, which shifted progressively southward; carbonate [[turbidite]]s became increasingly abundant (Calabazar* and Mata* formations). In the Florida Straits, carbonate deposition did not keep up with subsidence as indicated by the increase in pelagic deposits, including [[chert]] (upper Casablanca Group).

Toward the south, the volcanic activity that formed the lower Cabaiguan* sequence decreased markedly, and argillaceous, calcareous sedimentation became predominant, whereas conditions remained pelagic. The detrital limestones in the southernmost outcrops of the volcanic sequence (Cristobal* Formation) that contain abundant Upper Jurassic reworked carbonates (including [[oolite]]s) indicate an unknown southern source, possibly the Yucatan Platform.

Toward the south, the volcanic activity that formed the lower Cabaiguan* sequence decreased markedly, and argillaceous, calcareous sedimentation became predominant, whereas conditions remained pelagic. The detrital limestones in the southernmost outcrops of the volcanic sequence (Cristobal* Formation) that contain abundant Upper Jurassic reworked carbonates (including [[oolite]]s) indicate an unknown southern source, possibly the Yucatan Platform.