Cumulate rock information

of other older cumulates of different composition and colour, typically giving the cumulate rock a layered or banded appearance. Cumulate rocks are the...

ultrabasic rock – A type of pyroxenite, composed of clinoproxene and orthopyroxene Wehrlite – Ultramafic rock - An ultramafic plutonic or cumulate rock, a type...

Igneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic...

layered ultramafic intrusions where differentiated rock types often occur in layers. Such cumulate rock types do not represent the chemistry of the magma...

of wehrlite, olivine pyroxenite, harzburgite, and even chromitite (a cumulate rock consisting largely of chromite). Small layered intrusions may be of...

plutonic igneous rock composed primarily of hornblende amphibole is called a hornblendite, which is usually a crystal cumulate rock. Igneous rocks with...

contradicted by zircon data, which suggests leucosomes are a residue (a cumulate rock) left by extraction of a primary magma. When it is impossible to find...

mineralisation – Fe-Ni-Cu-PGE ore deposit Ultramafic rock – Type of igneous and meta-igneous rock Cumulate rock – Igneous rocks formed by the accumulation of...

are known as cumulate rocks, and those parts are the first which crystallize out of the magma. Identifying whether a rock is a cumulate or not is crucial...

doubtful value because a cumulate rock does not represent the melt from which it was extracted. However, if the groundmass of a cumulate can be analysed, it...

Chromitite is an igneous cumulate rock composed mostly of the mineral chromite. It is found in layered intrusions such as the Bushveld Igneous Complex...

hyaloclastite, sheeted dykes, gabbro, plagiogranite and ultramafic cumulate rock. Mantle rocks exposed in the ophiolite are the peridotite varieties...

The vast Bushveld Igneous Complex of South Africa includes cumulate layers of the rare rock type, chromitite, composed of 90% chromite, Plutonism – Geological...

During cooling, crystals will form from the melt. Thus, the crystal/melt ratio increases, generating a magma, a crystal-mush, and finally a cumulate rock....

crust and erupts on the surface. The erupted materials consist of molten rock (lava), hot fragmental debris (tephra or ash), and gases. Volcanism is a...

in the highlands, and is inferred to represent plagioclase flotation cumulates of the lunar magma ocean, with interstitial mafic phases formed from trapped...

Geologists have described it as a coarse-grained olivine-plagioclase cumulate with a granular polygonal texture. Olivine and plagioclase are of about...

Cross-bedding Cross-stratification; also trough-cross stratification. Cumulate; see also layered intrusion Decussate Devitirification; devitrified Dendritic...

slowly cools and crystallizes over time. Petrology Igneous petrology Cumulate rock "Department of Earth Sciences » Experimental Petrology". Nandedkar,...

occur with crystal accumulation, forming pseudo-sedimentary structures. Cumulate rock Igneous differentiation Morris, Christopher Gilbert (1992), Academic...

layers of 4 Vesta's crust, and are a transition group towards the cumulate eucrites. Cumulate eucrites are rare types with oriented crystals, thought to have...

is interpreted as depleted mantle rock, from which basaltic magma has been extracted. It also forms as a cumulate in Type I layered intrusions, forming...

Websterite is ultramafic igneous rock that consists of roughly equal proportions of orthopyroxene and clinopyroxene. It is a type of pyroxenite. Websterite...

crystallisation of pyroxene and plagioclase, or as part of a layered intrusion as a cumulate formed by settling of pyroxene and plagioclase. An alternative name for...