Search results

medium-grained subvolcanic or hypabyssal rock (typically formed higher in the crust in dikes and sills). Because the solid country rock into which magma intrudes...

A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at depths less than 2 km (1.2 mi) within the crust...

from a volcano. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks...

fracturing. Mt Ngungun consists of subvolcanic rock, also known as a hypabyssal rock, an intrusive rock emplaced at medium-to-shallow depths within the...

In petrology, pawdite is a dark-colored, fine-grained, granular hypabyssal rock composed of magnetite, titanite, biotite, hornblende, calcic plagioclase...

are termed subvolcanic or hypabyssal rocks and they are usually much finer-grained, often resembling volcanic rock. Hypabyssal rocks are less common than...

eye). This geological texture results from rapid cooling in volcanic or hypabyssal (shallow subsurface) environments. As a rule, the texture of these rocks...

results. Anorthoclase occurs in high temperature sodium rich volcanic and hypabyssal (shallow intrusive) rocks. The mineral is typically found as a constituent...

an igneous rock Litchfieldite – A metamorphosed nepheline syenite occurrence near Litchfield, Maine Llanite – Type of mineral – A hypabyssal rhyolite with...

hexagonal columns. These tend to be a result of cooling and contraction in hypabyssal intrusions or lava flows. Desiccation cracks are joints that form in a...

progresses. The geologic occurrence of Iddingsite is limited to extrusive or hypabyssal rocks, and it is absent from deep-seated rocks. Iddingsite is an epimagmatic...

crystals over 2 mm across)—as gabbro. Diabase and gabbro are thus the hypabyssal and plutonic equivalents of basalt. During the Hadean, Archean, and early...

Ridge is a deeply eroded silicic igneous intrusion. It consists of a hypabyssal intrusion that contains rhythmically layered glassy rocks and plutonic...

differing rock facies. These differing facies are associated with a particular style of magmatic activity, namely crater, diatreme and hypabyssal rocks....

based on observations that most large igneous provinces include both hypabyssal and surficial manifestations of voluminous mafic magmatism within the...

plutons of the Andean Intrusive Suite. There are also basic and acid hypabyssal dykes that may date to the Late Cretaceous. The Arctowski Peninsula was...

that the earthquake swarm was caused by brittle failure and fracturing of rock at depth from magma intrusion. No volcanic eruption was likely as the number...

The igneous cycle has three phases namely, the volcanic, plutonic and hypabyssal. The eruption is reported to be of fissure type. The pyroclastic exposed...

kilometres (0.62 to 2.49 miles) below the surface with rocks ranging from hypabyssal to plutonic. Exposure of the King Island Pluton and the Bella Bella and...

years old elsewhere. Major element analyses of Alert Bay volcanic and hypabyssal rocks suggest two different basalt-andesite-dacite-rhyolite suites with...