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National Geologic Map Database

Geologic Unit: White Mountain

Usage:

White Mountain Plutonic-Volcanic Suite (ME*,NH*,VT*)
/White Mountain magma series [informal] (ME,NH,VT)

[When referring to the White Mountain magma series of Billings (1934), please use informally. The practice of employing "Series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper (ACSN, 1961, 1970; NACSN, 1983, 2005). The term "Series" is applied formally only to chronostratigraphic units.]


Subunits:

(alphabetical): Agamenticus Complex (ME), /Albany Porphyritic Quartz Syenite (NH) or /Albany Quartz Syenite (NH), Alfred Complex (ME), Black Cap Granite (NH), Chocorua Granite (NH), Conway Granite (NH*), Moat Volcanics (NH*), /Mount Garfield Quartz Syenite (NH), Mount Osceola Granite (NH*), Passaconaway Syenite (NH), Red Hill Complex (NH).


Geologic age:

Middle Triassic to Early Cretaceous*


Type section, locality, area and/or origin of name:

Type area: North Conway 15-min quadrangle, northern NH (M. Billings, letter dated July 19, 1935).


AAPG geologic province:

New England province*


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

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).