The tholeiitic magma series (/ˌθoʊliˈaɪtɪk/) is one of two main magma series in subalkaline igneous rocks, the other being the calc-alkaline series. A...

abundant rocks include tholeiitic to transitional mafic fragmental rocks and massive flows, as well as felsic tuffs, tholeiitic pillow basalts and minor...

subalkaline magma series, the other subalkaline magma series being the tholeiitic series. A magma series is a series of compositions that describes the...

tectonic setting produces basalt with its own distinctive characteristics. Tholeiitic basalt, which is relatively rich in iron and poor in alkali metals and...

example is nephelinite. Magmas are further divided into three series: The tholeiitic series – basaltic andesites and andesites. The calc-alkaline series –...

Examples of lava compositions (wt%) Component Nephelinite Tholeiitic picrite Tholeiitic basalt Andesite Rhyolite SiO2 39.7 46.4 53.8 60.0 73.2 TiO2 2...

Tholeiitic basalt magma   SiO2 (53.8%)   Al2O3 (13.9%)   FeO (9.3%)   CaO (7.9%)   MgO (4.1%)   Na2O (3.0%)   Fe2O3 (2.6%)   TiO2 (2.0%)   K2O (1.5%)   P2O5...

Terevaka, respectively. Rano Kau developed between 0.78 and 0.46 Ma from tholeiitic to alkalic basalts. This volcano possesses a clearly defined summit caldera...

shield-stage lavas that built the enormous main mass of the volcano are tholeiitic basalts, like those of Mauna Loa, created through the mixing of primary...

Texture in a thin section of tholeiitic basalt...

rocks are andesitic lavas dated to about 24 million years ago, mixed with tholeiitic magma containing iron and magnesium. Mount Pelée, the island's most dramatic...

volcanic rocks are found in association with arcs. The chemically reduced tholeiitic magma series is most characteristic of oceanic volcanic arcs, though this...

The composition of the volcanics are a continuum of ultra-alkaline to tholeiitic and felsic rocks. It has been suggested that the diversity of the compositions...

typically make up rock. The Martian surface is primarily composed of tholeiitic basalt, although parts are more silica-rich than typical basalt and may...

few 22-million-year-old vents. The composition of the lavas varies from tholeiitic basalt to rhyolite. Landforms include sheet flows, cinder cones, and shield...

relatively uniform volcanic rocks consisting of olivine basalt that forms a tholeiitic to alkali basalt suite; the alkaline basalts were originally interpreted...

Their composition includes picrite pillows at the base, followed by tholeiitic lavas, then hyaloclastites, then the poikilitic sills. The CLF was gradually...

volcanic system on the Reykjanes Ridge. The erupted rocks are from the tholeiitic magma series and picrite basalt. There is not a central volcano, but rather...

subsided below sea level. The volcanic rocks associated with this rise are tholeiitic lavas and intrusive lamprophyre sheets, which form a volcanic basement...

N ↓ Formed by Erosion and volcanism Geology basaltic tephra deposits, tholeiitic pillow lavas, limestone,mudstone and siltstone Highest elevation 133 m...

on islands far from land, but such oceanic occurrences are rare. The tholeiitic magmas erupted at volcanic ocean islands, such as Iceland, can sometimes...

mid-ocean ridge and plate boundary seamounts are mostly basaltic (both tholeiitic and alkalic), whereas flows from subducting ridge volcanoes are mostly...

classified as alkali or tholleiitic gabbros, by analogy with alkali or tholeiitic basalts, of which they are considered the intrusive equivalents. Alkali...

Waiʻaleʻale, among the wettest places on earth. The canyon is carved into the tholeiitic and post-shield calc-alkaline lavas of the canyon basalt. The lavas of...

Strathcona Park is part of the Karmutsen Formation, which is a sequence of tholeiitic pillow basalts and breccias. Since Vancouver Island has become an accretionary...

from summit calderas. They are composed of either tholeiitic olivine or picritic basalt. The tholeiitic shields tend to be wider and shallower than the...

degree of chemical uniformity across geologic time, being mostly iron-rich tholeiitic basalts. Their major element chemistry is similar to mid-ocean ridge basalts...

its trails visitors can find Tholeiitic basalts. Tholeiitic basalts - Clam Falls Volcanics, Mesoproterozoic Tholeiitic basalts - Clam Falls Volcanics...

It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. The word dacite comes from Dacia, a province...

taller, younger, have well developed calderas, and are mostly composed of tholeiitic basalt, while those on the east are shorter, older, lack calderas, and...