tectonic breccia

tectonic breccia

[tek′tän·ik ′brech·ə]
(petrology)
A breccia developed from brittle rocks, formed as a result of crustal movements and produced by lateral or vertical pressure. Also known as dynamic breccia; pressure breccia.
References in periodicals archive ?
For the first type, the breccia fragments are composed of poorly sorted angular clasts of altered andesite, volcanic breccia and tectonic breccia, which were cemented by quartz-sulfide veins and the breccia partly contains chlorite and illite alteration minerals and pyrite (Fig.
Fossil earthquake evidenced by the silicified tectonic breccia of the Cabo Frio area, State of Rio de Janeiro, Brazil, and its bearings on the genesis of stick-slip fault movement and the associated amagmatic hydrothermalism.
As the actual contact between basement and cover rocks occurs as a tectonic breccia in most of the observed contact areas, it is not generally possible to measure in outcrop the orientation of the contact plane.
They are formed by individual sub-parallel fractures usually filled with tectonic breccia and tectonic clay.
Both the described fractures represent zones filled with a tectonic breccia (Fig.