Data Report: Planktonic foraminiferal biostratigraphy across the Cretaceous/Paleocene boundary at Shatsky Rise (ODP Leg 198, NW Pacific)
Capitolo
Data di Pubblicazione:
2005
Citazione:
Data Report: Planktonic foraminiferal biostratigraphy across the Cretaceous/Paleocene boundary at Shatsky Rise (ODP Leg 198, NW Pacific) / I. Premoli Silva, M.R. Petrizzo, D. Melloni (PROCEEDINGS OF THE OCEAN DRILLING PROGRAM. SCIENTIFIC RESULTS). - In: Extreme Warmth in the Cretaceous and Paleogene: A Depth Transect on Shatsky Rise, Central Pacific[s.l] : Ocean Drilling Program, 2005 Jan 06. [10.2973/odp.proc.sr.198.111.2005]
Abstract:
During Leg 198, the Cretaceous/Paleocene (K/P) boundary was recovered in a remarkable set of cores in nine separate holes at Sites 1209, 1210, 1211, and 1212 on the Southern High of Shatsky Rise. The boundary succession includes an uppermost Maastrichtian white to very pale orange, slightly indurated nannofossil ooze overlain by lowermost Paleocene grayish orange foraminiferal ooze. The boundary between the uppermost Maastrichtian and the lowermost Paleocene is clearly bioturbated. The contact surface is irregular, and pale orange burrows extend 10 cm into the white Maastrichtian ooze.
Preliminary investigations conducted on board revealed that the deepest sections of these burrows yielded highly abundant, minute planktonic foraminiferal assemblages dominated by Guembelitria with rare Hedbergella holmdelensis and Hedbergella monmouthensis, possibly attributable to the lowermost Paleocene Zone P0. The substantial thickness of the uppermost Maastrichtian Micula prinsii (CC26) nannofossil Zone and the lowermost Danian Parvularugoglobigerina eugubina (P) foraminiferal Zone suggested that the K/P boundary was rather expanded compared to the majority of deep-sea sites (see Bralower, Premoli Silva, Malone, et al., 2002).
This data report concerns the planktonic foraminiferal biostratigraphy across the K/P boundary in Hole 1209C, the shallowest site (2387 m water depth), and in Hole 1211C, the deepest site (2907 m water depth), where the foraminiferal record across the boundary appeared to be best preserved.
Tipologia IRIS:
03 - Contributo in volume
Elenco autori:
I. Premoli Silva, M.R. Petrizzo, D. Melloni
Link alla scheda completa:
Titolo del libro:
Extreme Warmth in the Cretaceous and Paleogene: A Depth Transect on Shatsky Rise, Central Pacific