batholith


Also found in: Dictionary, Thesaurus, Wikipedia.

batholith

batholith, enormous mass of intrusive igneous rock, that is, rock made of once-molten material that has solidified below the earth's surface (see rock). Batholiths usually are granitic (see granite) in composition, have steeply inclined walls, have no visible floors, and commonly extend over areas of thousands of square miles. Batholiths are formed either as one large mass or many smaller masses at great depths in the earth's crust and are exposed at the surface only after considerable erosion of the overlying mountain mass. They are commonly associated with lithospheric plate boundaries, where the interactions between plates can produce sufficient heat to melt crustal rocks on a large scale and form batholiths (see plate tectonics). One of the largest single batholiths in North America is the Coast Range batholith of W Canada and Alaska, encompassing an area of about 73,000 sq mi (182,500 sq km). Important batholiths in the United States include the Idaho batholith, 18,000 sq mi (45,000 sq km), and the Sierra Nevada batholith, 16,000 sq mi (40,000 sq km).
The Columbia Electronic Encyclopedia™ Copyright © 2022, Columbia University Press. Licensed from Columbia University Press. All rights reserved.

batholith

[′bath·ə‚lith]
(geology)
A body of igneous rock, 40 square miles (100 square kilometers) or more in area, emplaced at great or intermediate depth in the earth's crust.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A similar WNW structural regime is well-developed in the Yeoval Batholith to the north and is visible in most of the geophysical imagery throughout the region.
The alteration halos are composed of chlorite [+ or -] calcite [+ or -] epidote, in the diorites and quartz diorites of Segovia batholith and of muscovite [+ or -] illite + quartz + pyrite in the black shales of Segovia sedimentary rocks.
The Fuzishan deposit (115[degrees]08'00" to 115[degrees]09'06" E, 29[degrees]19'08" to 29[degrees]20'06" N) is located in southeastern margin of the Yangxin batholith, east portion of the Edong district (Figure 2).
To provide additional crystallization ages for the plutons comprising the Saint George Batholith, six samples were selected for laser ablation inductively coupled plasma-mass spectrometry (LA ICP-MS) analysis at the University of New Brunswick's Department of Earth Sciences.
The regional gradient shows a local smoothing over the Pedroches batholith, which is a NW-SE-trending formation of acidic plutonic rocks (e.g., Garcia-Lobon et al., 2014).
Geophysical results infer the Groundhog Project lies along the Northeast margin of the large Cretaceous granodiorite Kaskanak batholith and is intersected by a north-northeast-trending corridor of distinctive co-magmatic hypabyssal intrusives.
Karakoram high-grade metasediments were thrust southwards over low-grade metasediments previously deformed along the Shyok suture zone (Carboniferous to Albian-Aptian) and the Ladakh Batholith (Cretaceous to Eocene) (Searle et al., 1987; Searle and Tirrul, 1991).