Changes

[[Turonian]] and [[Coniacian]] rockss are not common across most of the nonvolcanic area (80 Ma; [[:file:St58OverviewFG30.JPG|Figure 10]]). They are present to the north in the Cayo Coco area, to the south in the Seibabo area in central Cuba, and in a few units of the southern and northern Rosario belts in western Cuba. The [[strata]] above and below the missing interval all have deep-water characteristics, and no evidence of subaerial [[erosion]] exists to explain the lack of the Turonian and Coniacian sediments across such a large area. Either there was no deposition, or the section was eroded because of changes in current patterns or [[submarine slide]]s. Local erosion is unlikely because a [[hiatus]] of the same age has been found in many of the holes drilled by the [http://www.deepseadrilling.org/ Deep Sea Drilling Project (DSDP)] in the southern Gulf of Mexico and the western Atlantic. Toward the north, in the platform to deep-water province, whatever sediments remain show that sedimentation continued under [http://www.merriam-webster.com/dictionary/pelagic pelagic] conditions and was essentially calcareous, with subordinate [[chert]]s.

[[Turonian]] and [[Coniacian]] rockss are not common across most of the nonvolcanic area (80 Ma; [[:file:St58OverviewFG30.JPG|Figure 10]]). They are present to the north in the Cayo Coco area, to the south in the Seibabo area in central Cuba, and in a few units of the southern and northern Rosario belts in western Cuba. The [[strata]] above and below the missing interval all have deep-water characteristics, and no evidence of subaerial [[erosion]] exists to explain the lack of the Turonian and Coniacian sediments across such a large area. Either there was no deposition, or the section was eroded because of changes in current patterns or [[submarine slide]]s. Local erosion is unlikely because a [[hiatus]] of the same age has been found in many of the holes drilled by the [http://www.deepseadrilling.org/ Deep Sea Drilling Project (DSDP)] in the southern Gulf of Mexico and the western Atlantic. Toward the north, in the platform to deep-water province, whatever sediments remain show that sedimentation continued under [http://www.merriam-webster.com/dictionary/pelagic pelagic] conditions and was essentially calcareous, with subordinate [[chert]]s.

Toward the south in the [[Wikipedia:Basic_rock|basic]] igneous-volcanic province, conditions were also dominantly pelagic. Sedimentation was accompanied by a renewal of volcanism, with an outpouring of flows and other [[Wikipedia:Ejecta|ejecta]] of a more [http://geology.about.com/od/rocks/ig/igrockindex/rocpicrhyolite.htm rhyolitic] composition (Pastora* Group). Evidence of subaerial volcanism (such as glass bombs and ash beds) exists. Shallow-water [[reef]]s with [[rudist]]s, [[coral]]s, and large [[foraminifera]] are commonly associated with the volcanics and volcaniclastics. This was the period of major [http://geology.about.com/library/bl/blnutshell_subducfactory.htm arc volcanism] associated with subduction. It was also the time of [http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3598.html intrusion] of the Manicaragua granodiorite into the central Cuba volcanics.

Toward the south in the [[Wikipedia:Basic_rock|basic]] igneous-volcanic province, conditions were also dominantly pelagic. Sedimentation was accompanied by a renewal of volcanism, with an outpouring of flows and other [[Wikipedia:Ejecta|ejecta]] of a more [http://geology.about.com/od/rocks/ig/igrockindex/rocpicrhyolite.htm rhyolitic] composition (Pastora* Group). Evidence of subaerial volcanism (such as glass bombs and ash beds) exists. Shallow-water [[reef]]s with [[rudist]]s, [[coral]]s, and large [[foraminifera]] are commonly associated with the volcanics and volcaniclastics. This was the period of major [http://geology.about.com/library/bl/blnutshell_subducfactory.htm arc volcanism] associated with subduction. It was also the time of [http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3598.html intrusion] of the Manicaragua [https://wwwf.imperial.ac.uk/earthscienceandengineering/rocklibrary/viewglossrecord.php?gID=00000000073 granodiorite] into the central Cuba volcanics.

===Campanian-Maastrichtian===

===Campanian-Maastrichtian===