This rare, early map depicts the geology along the Connecticut River from Westminster, Vermont to New Haven, Connecticut. A legend at top provides color coding for 15 different geological types including granite, limestone and coal formations. Along the right side of the sheet is a full-length "Profile crossing the strata at right angles from Shelburne to the mouth of Miller's River." This is the first geological map of Connecticut according to the listing in Marcou.

The map is still bound into Volume VI of The American Journal of Science (5.2 x 8.8"). 408 pp. with articles covering geology, mineralogy, botany and conchology. Includes 13 plates of shells, rocks and fossils. 8vo, hardbound in quarter calf and tips over marbled paper boards.

References: Marcou & Marcou #196.

Condition: B+

Map is very good with light toning and soiling with three tiny holes only visible when held to light. Text and plates have light toning and offsetting with a few plates moderately toned. Spine is cracked and covers are lightly worn and stained.