Velfjord. Beskrivelse til det berggrunnsgeologiske gradteigskart I 18 - 1:100 000.

The various lithologies are described. These comprise granitic basements rocks of supposed Pre-Cambrian age and Cambro-Silurian supracrustals and intrusives. The intrusives are mostly found within the Bindal and Velfjord massifs. These massifs are younger than the supracrustals, but their mutual age...

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Bibliographic Details
Main Author: Myrland, Rolf
Format: Article in Journal/Newspaper
Language:Norwegian
Published: 1972
Subjects:
OMVANDLING
PETROGRAFI
MALMGEOLOGI
KARTLEGGING
OMDANNING
STRUKTURGEOLOGI
Helgeland
Brønnøy
Bindal
Sømna
Vevelstad
Velfjord
Eiterådalen
Tosbotn
Online Access:https://hdl.handle.net/11250/2674947
Description
Summary:The various lithologies are described. These comprise granitic basements rocks of supposed Pre-Cambrian age and Cambro-Silurian supracrustals and intrusives. The intrusives are mostly found within the Bindal and Velfjord massifs. These massifs are younger than the supracrustals, but their mutual age relationship is uncertain. Tectonically the rocks are sitated in \"the high metamorphic nappe-complex\" of central and western Helgeland. The supracrustal rocks have undergone at least three phases of Caledonian folding, the F2 phase producing the main regional structures. The rocks have mineral assemblages which place them in the almandine-amphibolite metamorphic facies. 35153

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