Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia

Swiss Journal of Palaeontology

Table 4 Strontium isotope data and age estimates from the Jimol Formation

Locality (STRI)	Height (m)	Sample (MUN-STRI)	Taxon	⁸⁷86/⁸⁶Sr	Age (Ma)	Age range (Ma)
290819	−118	38108	Tucetona democraciana	0.708654	17.13	17.02–17.25
290820	−117	38114	Antigona sp.	0.708654	17.13	17.02–17.25
290816	−103	38014	Tucetona democraciana	0.708679	16.71	16.60–16.83
290427	−60	16895	Crassostrea sp.	0.708649	17.19	17.08–17.31
290427	−60	16895	Crassostrea sp.	0.708633	17.45	17.34–17.55
290428	−55	16883	Crassostrea sp.	0.708658	17.05	16.93–17.15
290430	−42	17068	Anadara sp. cf. zuliana	0.708641	17.33	16.96–17.65
290430	−42	17068	Anadara sp. cf. zuliana	0.708633	17.45	17.10–17.75
290476	−42	17068	?	0.708696	16.39	16.29–16.51
290476	−42	17068	?	0.708713	16.01	16.01–16.21
290436	0	16882	Turritella matarucana	0.708629	17.51	17.16–17.80
290436	0	16882	Turritella matarucana	0.708668	16.89	16.48–17.27

Ages in italic indicate unreliability relative to replicate samples from same horizon or stratigraphic position
Specimens are reposited at the Mapuka Museum of Universidad del Norte (MUN-STRI), Colombia. Locality numbers can be searched in the STRI Geological Sample Database (http://biogeodb.stri.si.edu/jaramillo/fossildb)