supracrustal rocks

supracrustal rocks

[¦sü·prə′krəst·əl ′räks]
(geology)
Rocks that overlie basement rock.
References in periodicals archive ?
The Archean supracrustal rocks underlying most of the claim group are about 3.
Zone 2 comprises magnetically low-relief supracrustal rocks of the Lake Harbour Group, which are intruded by magnetite-bearing plutonic rocks and subsequently folded.
Good matches are evident between the Carrabassett and Ganderia supracrustal rocks with strong similarities at ~600 Ma and the common peak centered at ~1200 Ma.
91 Ga gneissic tonalites and associated supracrustal rocks in the Rautalampi area, central Finland.
The Skellefte district is composed principally of Precambrian supracrustal rocks that are exposed in the valley of the Skellefte River.
DM is found in supracrustal rocks of mid- to lower-Proterozoic age that are surrounded by variably migmatised and deformed micaceous quartzo-feldspathic gneisses of the Chiquitania Complex.
Correlations between the two data types can be seen over the supracrustal rocks (labelled A and B on Fig.
The paper deals with the composition of metamorphosed supracrustal rocks, variation in their mineralogical composition, and regional and local estimates of metamorphic pressure-temperature (P-T) conditions and ages.
All of the supracrustal rocks on Fogo Island are openly folded about axial planes trending northeast and dipping about 65[degrees] to the south.
Russian geologists have also found another new type of diamond deposit associated with metamorphic processes, developing after ancient supracrustal rocks.
Work in the Precambrian supracrustal rocks are summarized.