Skip to main content

Table 6 Strontium isotope data and age estimates from the Castilletes Formation

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

Locality (STRI)

Height (m)

Sample (MUN-STRI)

Taxon

8786/86Sr

Age (Ma)

Age range (Ma)

290666

41a

37193

Anadara sp. cf. zuliana

0.708713

16.10

16.01–16.21

290455

45

17073

Crassostrea sp.

0.708696

16.33

16.01–16.80

290455

45

17073

Phacoides sp.

0.708714

16.07

15.71–16.46

290456

46

17049

Crassostrea sp.

0.708701

16.31

15.93–16.71

290456

46

17049

Anadara sp. cf. zuliana

0.708706

16.22

15.85–16.62

290423

49b

16872

Anadara sp. cf. zuliana

0.708707

16.21

16.10–16.32

290423

49b

16872

Turritella matarucana

0.708749

15.52

15.43–15.62

290423

49b

16872

?

0.708777

15.08

14.94–15.21

290423

49b

16872

?

0.708757

15.42

15.33–15.51

290666

52a

37192

Anadara sp. cf. zuliana

0.708667

16.91

16.79–17.02

290666

55a

37191

Crassostrea sp.

0.708623

17.59

17.48–17.68

290469

105

16962

Anadara sp. cf. zuliana

0.708731

15.82

15.73–15.91

290469

105

16962

Turritella matarucana

0.708747

15.57

15.47–15.67

290438

152

17044

Tucetona democraciana

0.708735

15.76

15.67–15.85

290438

152

17044

Panchione sp.

0.70881

13.24

12.92–13.71

290446

189

16907

Anadara sp. cf. zuliana

0.708760

15.37

15.37–15.56

290446

189

16907

Anadara sp. cf. zuliana

0.70878

15.01

14.86–15.15

290461

275

16918

Anadara sp. cf. zuliana

0.708774

15.14

14.50–15.51

290461

275

16918

Anadara sp. cf. zuliana

0.708766

15.29

14.79–15.64

290461

275

16918

Anadara sp. cf. zuliana

0.708759

15.39

14.97–15.75

290461

275

16918

Anadara sp. cf. zuliana

0.708767

15.27

14.76–15.62

290463

276

16885

Glyptoactis paraguana

0.708756

15.43

15.04–15.79

290463

276

16885

Glyptoactis paraguana

0.708703

16.28

16.17–16.39

290463

276

16885

Glyptoactis paraguana

0.708882

10.12

9.93–10.34

290662

319

37819

Eucrassatella venezuelanus

0.708792

14.71

14.41–14.88

290828

386

38133

Anadara sp. cf. zuliana

0.708844

11.52

11.21–11.95

  1. aLocalities correlated to the basin composite stratigraphy with low–moderate accuracy
  2. bPossibly faulted block and correlated to the basin composite stratigraphy with low–moderate accuracy; ages in italic indicate unreliability relative to replicate samples from same horizon or stratigraphic context. 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)