extrusive

Extrusive rocks (e.g., basalt and dacite) have much higher [rho] than those of intrusive rocks; among them, [rho] of plutonic rock is generally higher than that of hypabyssal rock (Table 2).

In the area between Vohemar and Andapa, extrusive rocks form a long, thin belt parallel to the oceanic coast (see Figure 1).

The term was used initially to designate serpentinite and later on, a suite of mafic and ultramafic intrusive rocks (ultramafic rocks, gabbro, and diabase) and volcanic extrusive rocks (Brongniart 1821).

of Minnesota, US)--are "determining flow/emplacement directions in sediments, intrusive, and extrusive rocks; establishing principal orientations (as well as estimating magnitudes) of finite or incremental strains; and ascertaining the extent of possible deviations of NRM [natural remanence magnetization] vectors from the palaeofield orientation due to anisotropic and/or subsequent deformation." The editors present these 26 papers as representative of the current state of the art in magnetic fabric analysis, covering physical foundations, geological applications, and directions for future research.

The property is underlain by a northeast striking belt of basic intrusive and extrusive rocks intercalated with metasedimentary rocks and intruded by quartz feldspar porphyry and felsitic rocks.