Torres Pérez-Hidalgo, Trinidad José
Geochemistry of Persististrombus latus Gmelin from the Pleistocene Iberian Mediterranean realm.
"Lethaia", v. 43
In this paper the organic and inorganic geochemistry of fossil and extant Persististrombus
latus are compared, together with other strombid species (Lentigo lentiginosus, Lobatus
gigas, Strombus alatus, Lobatus raninus, Laevistrombus canarium and Tricornis latissimus).
Using a large sample of well-preserved fossil P. latus shells from the Mediterranean
realm, we examined the warming period of sea water in the Middle Pleistocene. A mineralogical study of the shells demonstrates the continuous presence of calcite and a complex
organic matter distribution, which was well preserved in many cases, thereby
making the U/Th dating of strombid shells unreliable. U /Th analysis of coral samples
and amino acid racemization dating of pelecypod shells confirmed that P. latus entered
the Mediterranean realm in MIS 7 and 5. The oscillations of the 0 values reflect
annual growth periods and provide a mixing of the first signal record (primary growth)
and successive overgrowths. • Amino acid racemization, Mediterranean Sea, Persististrombus
latus, shell mineralogy, U/Th, O.