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Guys
Hill sandstone at Broomwell, with organic-rich mudstones alternating
with ?fluviatile sandstones. |
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General
view of central Jamaica. The hill in the foreground is Main Ridge
composed of ?Lower Cretaceous volcanics (basement). |
Sandstones with ripple cross-lamination (?fluviatile, ?tidal)
within the organic-rich shales of the Guys Hill Formation at Broomwell.
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General view of organic-rich shales of the Guys Hill Formation
at Broomwell. |
Mouldic porosity in Guys Hill Formation, Blowfire corehole
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Guys Hill Formation in Blowfire Hill corehole.
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Ripple cross-lamination (?fluviatile, ?tidal) within the organic-rich
shales of the Guys Hill Formation at Broomwell.
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Organic-rich mudstones, Guys Hill Formation, Broomwell.
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Organic-rich mudstones at Broomwell.
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Organic-rich mudstones at Broomwell.
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Rudist-rich limestones with high primary porosities, Guinea Corn
Formation, Cabbage Hill.
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Pindars River. Sands and shale
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General
view of Cockpit karst. |
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Locals
at Windsor, St. Ann’s Bay. |
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Gas
seep, Windsor, St. Ann’s Bay. |
Gas seep, Windsor, St. Ann’s Bay.
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Gas seep, Windsor, St. Ann’s Bay. |
Grantham. Tidal flat deposits.
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Grantham. Tidal flat deposits consisting of alternating mudstones
and sandstones with reversing palaeocurrent directions, Thomas
River Formation, Grantham |
Grantham. Tidal flat deposits consisting of alternating mudstones
and sandstones with reversing palaeocurrent directions, Thomas
River Formation, Grantham
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Grantham. Tidal flat deposits consisting of alternating mudstones
and sandstones with reversing palaeocurrent directions, Thomas
River Formation, Grantham |
Hectors River, Organic-rich mudstones in more distal setting.
Much of the Guys Hill Formation (300 m) composed of organic- rich
facies.
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Ignimbrites- View across the Central inlier looking at the mountains
formed of late Palaeocene ignimbrites (Thomas River Formation,
Summerfield Group).
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Organic-rich
shales in Hector’s River, Guys Hill Formation, Dr. Simon
Mitchell for scale!
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Boundary. Possibly?. Orgainc-rich mudstones in Cretaceous at Pindars
River (Guinea Corn Formation). |
Lichfied. Thick sandstones, either crevasse spay deposits or fluiviatile-influenced
deposits: high porosity and good lateral continuity.
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Lichfied.
Lignitic beds at teh top of teh outcrop. Thick sandstones, either
crevasse spay deposits or fluiviatile-influenced deposits: high
porosity and good lateral continuity. Dr Simon Mitchell for scale |
Oyster bed in Guys Hill Sandstones, Troy.
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Alternating organic-rich and fossiliferous limestones, Guinea
Corn Fromation, Pindars River |
Rudist porosity. Porosity in rudist bivalves in the Guinea Corn
Formation. |
Rudist. The rudist Macgillavryia nicholasi (Whitfield), Guinea
Corn Formation, Jamaica.
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Organic rich
shales @ Hector's River |
Lag. Sheet-like fluviatile crevasse splay sandstone up to 2 m
thick, Guys Hill Formation, Mountain River:P excellent reservoir
rocks. |
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