Carbonate Environments and Sequences of Caicos Platform: by Harold R. Wanless, Jeffrey J. Dravis, Lenore P. Tedesco,

By Harold R. Wanless, Jeffrey J. Dravis, Lenore P. Tedesco, Victor Rossinsky(auth.)

About The Product

Published by means of the yank Geophysical Union as a part of the Field journey Guidebooks Series.

The target of this box day trip is to distinction the depositional environments and sedimentary facies of 2 carbonate platform settings: the south Florida carbonate peninsula and Caicos Platform. In doing this, we can't basically distinction how physiographic atmosphere and weather strongly effect shallow-marine carbonate sedimentation yet, even as, current new substitute types of Bahamian sedimentation with direct software to the translation and prediction of similar old carbonate facies and sequences.

In addition to containing a standard suite of Holocene sedimentary facies, Caicos Platform additionally shows excellent outcropping Pleistocene marine and non-marine sequences, delivering an extraordinary chance to determine how smooth facies are preserved in 3 dimensions.

To permit comparability of significant controls on shallow-marine carbonate sedimentation, this box day trip will commence through in brief reading Holocene sedimentary environments and facies forming in south Florida below the effect of a non-oceanic, low-relief, shelf atmosphere and a wet weather.

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Extra resources for Carbonate Environments and Sequences of Caicos Platform: Caicos, British West Indies to Miami, Florida, July 20-26, 1989

Sample text

Cores taken in the inner algal marsh and in the inner portion of the pond zone are layered and represent the inner algal marsh and crust sequence. Where present, crusts are repetitive layers separated by soft layers. Bankward (southward) from the middle of the pond zone, depositional layering is not well preserved. The sequence is largely a mangrove-rooted peloidal FIGURE 31 Sketch of core sequences taken bankward from the erosional, south-facing tidal-flat coastline of North Caicos near Stop #13.

The authors have not focused on the role of mangroves here because it is important to see through their presence so as to understand the role of algal (cyanobacterial), physical and chemical sedimentation processes operating on the tidal flat. Mangrove influences are a diagenetic modification to previously deposited sediment. Mangroves are flowering plants and have only influenced sediments since the Tertiary. It is important to develop an appreciation of what tidal flats were like in the older rock sequences where they are so prevalent.

These islands form a nearly continuous barrier to tidal flow, wave energy and circulation along the northern margin and effectively isolate the northern skeletal sand rim from the non-skeletal sands of the platform interior. On the northeastern and northwestern margins, emergent islands form a discontinuous barrier and focus sites of onbank and offbank circulation and sediment transport through breaks in the island chain. An emergent Pleistocene reefal rim occurs along portions of the western margins of Providenciales and West Caicos (Figs.

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