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Geologic Unit: Magog
Map showing publication footprint
  • Usage in publication:
    • Magog formation
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Ami, H.M., 1900, Synopsis of the geology of Canada (being a summary of the principal terms employed in Canadian geological nomenclature): Royal Society of Canada Proceedings and Transactions, 2nd series, May, 1900, v. 6, p. 187-225.


Summary:

Pg. 200. Magog formation of Quebec group. Present in Lake Memphremagog basin. Similar to Norman's kiln shales of New York. Age is Ordovician.
[See also Lexicon of Canadian Geologic Units (http://cgkn1.cgkn.net/weblex/weblex_search_e.pl).]

Source: Publication; Lexicon of Canadian geologic units; GSC cardfile.


Map showing publication footprint
  • Usage in publication:
    • Magog conglomerate
  • Modifications:
    • [Principal reference]
  • AAPG geologic province:
    • New England province
Publication:

Dresser, J.A., 1925, The Magog conglomerate; a horizon mark in the "Quebec group": Royal Society of Canada Proceedings and Transactions, 3rd series, v. 19, sec. 4, p. 115-121.


Summary:

Pg. 116. Magog conglomerate. Ordovician, Quebec, Canada. Included in Quebec group.

Source: US geologic names lexicon (USGS Bull. 896, p. 1267).


Map showing publication footprint
  • Usage in publication:
    • Magog phase
  • Modifications:
    • Revised
    • Areal extent
  • AAPG geologic province:
    • New England province
Publication:

Richardson, C.H., 1929, The petrography of the Irasburg conglomerate, IN Perkins, G.H., Report of the State Geologist on the mineral industries and geology of Vermont, 1927-1928: Vermont Geological Survey [Report of the State Geologist], 16th, p. 107-110.


Summary:

Pg. 107-110. Magog phase of Irasburg conglomerate. Was discovered by Dresser, 1925. Its pebbles are pre-Ordovician and its matrix is Ordovician. It lies at base of my Memphremagog slates. In this report, it conforms to Northfield phase of the Irasburg, which is more than 100 miles farther south. Present in Quebec, Canada, and northeastern Vermont.

Source: US geologic names lexicon (USGS Bull. 896, p. 1267).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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