The Littleton-Moosilauke area occupies 300 square miles in west-central New Hampshire; it is covered by the Moosilauke topographic sheet and the New Hampshire portion of the Littleton sheet. Most of the area lies west of the White Mountains, but the southeast corner of the Moosilauke quadrangle contains some of the higher summits of this group.
The writer has long been interested in the problem of the age of the schists of the White Mountains, and, as the only fossil localities known in New Hampshire at the inception of this study were in the Littleton district, this area was chosen for special investigation. Obviously, the stratigraphy and structure of rocks of known age had to be deciphered first, and then their relations to the schists farther east determined. The study has achieved its major purpose and has shown that the schists in the western part of New Hampshire are of . . .