The geology of New HampshireA report comprising the results of explorations ordered by the legislature . nting together theslaty fragments, bears some resemblance to the Albany granite, exceptin the abundance of dark spots commonly present. I think the rock onthe top of Mt. Willard will probably turn out to belong to the Mt. Moteseries. The Helderberg Period. For a very long period of time New Hampshire furnishes no indica-tion of geological changes. Our next formation was deposited at thevery close of the Silurian era. Fossils have been found which identifythe strata with those of the Helderb
The geology of New HampshireA report comprising the results of explorations ordered by the legislature . nting together theslaty fragments, bears some resemblance to the Albany granite, exceptin the abundance of dark spots commonly present. I think the rock onthe top of Mt. Willard will probably turn out to belong to the Mt. Moteseries. The Helderberg Period. For a very long period of time New Hampshire furnishes no indica-tion of geological changes. Our next formation was deposited at thevery close of the Silurian era. Fossils have been found which identifythe strata with those of the Helderberg mountains in New York. The ocean must have retired from the Connecticut valley after thedeposition of the Coos rocks,—otherwise there would have been formedledges to indicate the fact of continued submergence. The Helderbergocean probably covered the same area with the one just described westof the Atlantic ridge, bordering the quartzite. The Helderberg rocksoccupy isolated areas in Bernardston, Mass., Hanover, Lyman, Lisbon, MEW H. IN lUJt Helderberg- Age. No, I I Area enj^osed to I ton \, ?? vijs, _rOj( Dix- )^ fflin i-^ L^iT >Top»- ^KSl^**^ I Ian- mm h^^
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Keywords: ., bookcentur, bookdecade1870, booksubjectbotany, booksubjectgeology
