Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations

Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations
State Maine
Name Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations
Geologic age Devonian - Silurian
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > AndesiteW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith U - Andesitic volcanic rocks
Comments U - Unmetamorphosed
References

Osberg, P.H., Hussey, A.M., and Boone, G.M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.

Hall, B.A., 1970, Stratigraphy of the southern end of the Munsungun anticlinorium, Maine: Maine Geol. Surv., Bull. 22, 63 p.

NGMDB product
Counties Aroostook - Penobscot - Piscataquis