Look up diabase in Wiktionary, the free dictionary. Diabase (/ˈdaɪ.əˌbeɪs/), also called dolerite (/ˈdɒl.əˌraɪt/) or microgabbro, is a mafic, holocrystalline...

The Diabase Hills are a mountain range in Washoe County, Nevada. "Diabase Hills". Geographic Names Information System. United States Geological Survey...

the diabasic portion and are composed of a distinct type of rock called Diabase-Schist-Tuff, as noted in earlier geological research. However, more recent...

The York Haven Diabase is a rock formation in Pennsylvania, United States. It underlies the Rossville Diabase and is Jurassic in age. The formation is...

University. Wherry theorized that the ringing was due to the texture of the diabase rocks and that they were supported by other rocks. He identified the boulder...

extrusive igneous rock. Types of trap rock include basalt, peridotite, diabase, and gabbro. Trap is also used to refer to flood (plateau) basalts, such...

Subvolcanic rocks include diabase (also known as dolerite) and porphyry. Common examples of subvolcanic rocks are diabase, quartz dolerite, microgranite...

The Nipissing sills, also called the Nipissing diabase, is a large 2217– to 2210–million year old group of sills in the Superior craton of the Canadian...

of this igneous rock. There is very little coarser-grained gabbro and diabase. Nephelinite is exposed on the islands but is extremely rare. The majority...

large body of diabase in central Montgomery County, Maryland, is known as the Boyds Sill, named after the town of Boyds. Jurassic diabase boulders in the...

diabase and subordinate layered diabase. Shoreline exposures of quartz, amphibole diabase, poikilitic diabase, and diabase with pegmatitic patches or veins...

pyroxene, amphibole, and biotite. Common mafic rocks include basalt, diabase and gabbro. Mafic rocks often also contain calcium-rich varieties of plagioclase...

as black granite. In geological terms, black granite might be gabbro, diabase, basalt, diorite, norite, or anorthosite. Morales Demarco, Manuela; Oyhantçabal...

Formation – which is covered by the hard, protective 60 m (200 ft) thick diabase cap.: iii, 2  The Rove Formation is part of the Animikie Group.: 32  The...

Contact between a dark-colored diabase dike (about 1100 million years old) and light-colored migmatitic paragneiss in the Kosterhavet National Park in...

formed where French Creek cuts across a series of diabase (trap rock) dikes. Erosion of the diabase dikes by the creek has caused huge boulders to fall...

completed until 1700. It has 4-5 metre thick walls made of granite, gneiss and diabase. Skansen Kronan was never attacked, and the cannons were never fired in...

and diabase. They are sometimes only a fraction of an inch in thickness, resembling a thin layer of pitch or tar on the edge of a crystalline diabase dike...

found on the flanks of Mount Moran to the north. Magmatic intrusions of diabase rocks 765 million years ago left dikes that can be seen on the east face...

some sections by one-quarter and the area of its base by four fifths. The diabase rock was used as building material in growing areas like Jersey City. The...

years ago. Along the river, the Palisades are of metamorphic basalt, or diabases, the Highlands are primarily granite and gneiss with intrusions, and from...

00 sq mi) around the canyon. The canyon is believed to have formed when a diabase sill dating from a billion years earlier was split open, either by the...

composition. A composite dike can include rocks as different as granophyre and diabase. While there is often little visual evidence of multiple injections in...

of a valley temple, now buried beneath the village of Nazlet el-Samman; diabase paving and nummulitic limestone walls have been found but the site has...

designated a National Natural Landmark, being "the best example of a thick diabase sill in the United States". It underlies a portion of northwest Staten...

rock, known as basalt, if extrusive, or diabase, if intrusive. East Rock, being intrusive, is diabase. Diabase is a dark colored rock, but the iron within...

Magma was injected between layers of sedimentary rock, forming diabase sills. This hard diabase protects the layers of sedimentary rock below, forming the...

Volcanic rock intermediate in composition between andesite and rhyolite Diabase, also known as dolerite – Type of igneous rock Diorite – Igneous rock type...

Hinckley Sandstone, Hovland Diabase Complex, North Shore Volcanic Group, Puckwunge Formation, Reservation River Diabase Complex, Solor Church Formation...

fine-grained, black igneous rock called diabase intruded into the granite during later volcanic activity. Diabase bodies, or dikes, are visible along the...