Dear Michal: I assume you are referring to the White Mountains Intrusives, which occur in New Hampshire and Vermont, in NE U.S.A. There is a good description of this lineation, mostly granitic plutons, which relates also to the Monterregian Hills in Canada (mostly alkaline bodies, including carbonatites), where both seem to have been produced by an extension inside of the North American continental plate of the New England Seamount Chain. In the book "Igneous Petrology", by C.J. Hugues (1982) Elsevier Pub., you can find the geology of both lineations with some detail, maps, and schemes, in pp. 360-364, Regards, Sebastián