Type sections,stratigraphy and problems relating to structure and magmatism of Karelides

The karelides are Karelian volcanic and sedimentary rocks in various stages of metamorphism which form broad northwesterly trending belts. These rocks occur in synclinoria between which are areas of the old granite-gneiss basement of the extensive Karelian massif. Details of the stratigraphic sequence, structure, magmatic and metamorphic events, and geologic history are described. Radioactive age determinations are interpreted within the framework of the inferred geologic history. This is a timely supplement to the recently published Volume 1 of The Precambrian, edited by K. Rankama. — C. G. Tillman.