Abstract
Mount Monadnock, Vermont (circa 3,200 feet), is the northernmost stock of alkali-syenite known in New England, and therefore the first in the southerly continuation of the eight similar "Monteregian Hills" of Canada-in all, nineteen such hills or mountains are marked on Figure 1, extending from Montreal, 215 miles, to Mount Agamenticus, Maine. Monadnock is a stock of quartz-nordmarkite, with an interior, older mass of essexite and with associated bostonite and camptonite dikes, intrusive into schists and quartzites of the upper Connecticut Valley, of probably lower Paleozoic age-the igneous rock much later, possibly Carboniferous. Descriptions of the minerals and rocks follow, including analyses of the hornblende, syenite, and essexite; an original topographic and geologic map; and two views of the mountain. Attention is called to the consanguinity shown by the minerals, and their combinations in the rocks, with those of the other hills.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
