Additional evidence of pre-Silurian high-pressure metamorphic rocks in Spitsbergen

• Published in: Polar Research
• Main Authors: Ohta, Yoshihide, Hiroi, Yoshikuni, Hirajima, Takao
• Format: Article in Journal/Newspaper
• Language: English
• Published: Norwegian Polar Institute 2010
• Subjects: Polar Research; Spitsbergen
• Online Access: https://polarresearch.net/index.php/polar/article/view/2560; https://doi.org/10.3402/polar.v1i2.6986

It has been previously suggested that the high-pressure metamorphic rock complcx of Motalafjclla. central-western Spitsbergen, is older than Lower Silurian. An unconformity has been discovered at the base of a limestone which contains fossils similar to those reported as Lower Silurian from the same massif. This proves that the high-pressure metamorphics represent an older rock complex. The unconformity surfacc is invcrted in the area, and large recumbent folds involving the Silurian Bulltindcn Formation havc been mapped. These folds are considered to be prc-Carboniferous