A late Pleistocene progradational clastic shoreface succession in Jamaica: Implications for the preservation potential of the echinoid Leodia
Article first published online: 12 MAR 2007
Volume 39, Issue 4, pages 321–327, December 2006
How to Cite
Mitchell, S. F., James, S. A. and Brown, I. C. (2006), A late Pleistocene progradational clastic shoreface succession in Jamaica: Implications for the preservation potential of the echinoid Leodia. Lethaia, 39: 321–327. doi: 10.1080/00241160600847553
- Issue published online: 12 MAR 2007
- Article first published online: 12 MAR 2007
- 30th August 2005, revised 22nd May 2006.
- fossil record;
- Port Morant Formation
A section in the Late Pleistocene Port Morant Formation of Jamaica shows a progradational deltaic succession passing from offshore muddy sands, through shoreface to foreshore deposits. The transition zone/lower shoreface has abundant Ophiomorpha burrows and contains common examples of the echinoid Leodia cf. sexiesperforata (Leske). Modern Leodia occur in shallow marine carbonate sands, and the Port Morant occurrence is the first record of abundant Leodia in the geological record. Despite their strong test construction that should give Leodia a high preservation potential, these echinoids have a poor fossil record because the environments in which they lived are rarely preserved. Consequently, the fossil record is biased towards species that occur in environments with high preservation potential.