San Sebastian Formation

Geology

Group: Rio Guatemala

Members: unnamed (26)

Lithologies: not reported (5), claystone (18), mudstone (1), sandstone (3), conglomerate (1), "limestone" (3), coal (2), lignite (6)

Paleoenvironments: marine indet. (9), terrestrial indet. (1), carbonate indet. (2), marginal marine indet. (1), lagoonal (2), deltaic indet. (2)

Age range: base of the Early/Lower Oligocene to the top of the Late/Upper Pleistocene or 33.90000 to 0.01170 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Oligocene33.9 - 28.4Puerto Rico (94188 94189 94187 94190 94191 144645)
Rupelian33.9 - 28.1Puerto Rico (San Sebastian) (228677)
Rupelian33.9 - 28.1Puerto Rico (209088)
Oligocene - Late/Upper Oligocene33.9 - 23.03Puerto Rico (32291 32282 32283 32284 32285 32286 32287 32288 32289 32290 32292 32293 32294 32295 32297 32299)
Late/Upper Oligocene28.4 - 23.03Puerto Rico (40508 56996 56998 57001 93694 94192 143057 155752)
Late/Upper Pleistocene0.129 - 0.0117Peru (71296)