The Pinnacles reefs consist of a lush fauna of hard, soft and, black corals, fixed sea lilies and sponges.
2.
The Intisar'D'Oil Field produces from an upper Paleocene pinnacle reef 385 m thick, 5 km in diameter, and at a depth of about 2700 m
3.
The Pinnacles reefs are currently too deep for reef-building corals to grow, and scientists suggest that these reefs were formed during low sea levels associated with the last ice age.
4.
Other active areas include the Cotton Valley Pinnacle Reef Trend in East Texas and to a lesser extent the Williston Basin of North Dakota and the Permian Basin in West Texas.
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