Tufflava

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Tufflava

 

a tuffaceous volcanic rock consisting of lava, ash, and fragments of glass. Tufflavas are intermediate in structure and method of formation between lavas and tuffs. Ignimbrite is a variety of tufflava.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The Banzifang Formation, the main wall rock of veins I and II, is widespread in this area and consists of andesite, basaltic andesite, dacite, trachyandesite, andesitic volcanic breccia, and tufflava. The Ningyuancun Formation, the major host rock of vein III, is composed of tuff, rhyolite, and volcaniclastic rock.
However, in rare cases the pressure of the overlying water column may be high enough to produce tufflava (tuff-like/lava-like rocks) that contain evidence of heat retention (cf., Downey, 2005).
12 Pb-Zn deposits (New Brunswick), the presence of peperites in association with pyroclastic rocks and tufflavas indicates the in situ emplacement of pyroclastic rocks (cf., Downey, 2005).