Unknown
PANGAEA
In:
Supplement to: Vallier, Tracy L; Windom, Kenneth E; Seifert, Karl E; Lee-Wong, Florence (1981): Petrologic and tectonic significance of volcanic clasts in upper Cretaceous nannofossil ooze, Deep Sea Drilling Project Site 466, southern Hess Rise. In: Thiede, J; Vallier, TL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 62, 961-966, https://doi.org/10.2973/dsdp.proc.62.151.1981
Publication Date:
2023-06-27
Description:
Alkali-basalt clasts in Upper Cretaceous sediments from Site 466 on southern Hess Rise suggest that parts of Hess Rise were constructed by off-ridge volcanic activity. Apparently, tectonic adjustments at Hess Rise occurred during the Late Cretaceous (Campanian-Maastrichtian), when parts of the original volcanic pedestal were uplifted and provided source rocks for the clasts. Synchronous volcanism may have occurred. Causes for the Late Cretaceous tectonic adjustments (and volcanism?) are not known, but they may be related to intraplate movement along the Mendocino Fracture Zone.
Keywords:
62-466; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg62; North Pacific/CONT RISE
Type:
Dataset
Format:
application/zip, 2 datasets
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