Basaltic Layer

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 It might be outdated or ideologically biased.

Basaltic Layer

 

the lower layer of the earth’s crust lying between the Conrad discontinuity and Mohorovičič discontinuity. The velocity of the longitudinal seismic waves (6.5–7.5 km/sec) in the basaltic layer makes it possible to assume that it is composed of gabbro.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Morphometric properties of the dome Hansteen 2 and the similarly flat domes V2 and Pal Modelling results for the minimum basaltic layer thickness h u intrusion depth d, and maximum magma pressure Dome h [m] slope size [km] V [[km.sup.3]] [[degrees]] Ha2 85 0.52 21x16.7 11.8 V2 80 0.82 11.0 1.9 Pa1 60 0.50 13.5 4.3 Dome [h.sub.1] d [km] [p.sub.0] [km] [MPa] Ha2 0.20 1.20 9.5 V2 0.08 0.38 2.9 Pa1 0.12 0.91 7.2 Table 3.
According to him the massive blocks are common striking features in thin basaltic layers particularly in the margin areas of the Deccan basalts and decomposition of the trap rocks under certain circumstances gives rise to eminently clayey products containing large percentage of iron.