A serpentine flow meanders through formations of smooth pahoehoe lava and rough aa lava, the same forms common in basalt lavas. |
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Except for its lower degree of partial melting, alkali basalt is thought to have an origin similar to that of tholeiite. |
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The large volumes of lava erupted in the main phase of flood basalt volcanism seem to have overwhelmed any hydromagmatic influence. |
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Flood basalt eruptions involve the effusion of gigantic volumes of low-viscosity lava that spread out over huge areas. |
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Geologically the axes from the New Guinea Highlands comprise thermally metamorphosed basalt, chert and greywacke depending on quarry source. |
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The basalt flows and gravel deposits were lifted to high altitudes by continuing upward tectonics. |
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We've got some rare basalt woodlands and 600 or 800 year old grass trees, and quite a few endangered species. |
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If natural stone, such as basalt or diabase, is used, the product is called rock wool. |
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Rocky outcrops of basalt lava dot the landscape, which climbs gently from 1,200 feet to peaks nearly 5,000 feet high. |
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The deepest layer is gabbro, coarse-grained but chemically equivalent to basalt, which forms when magma cools and crystallizes slowly. |
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I could bear cowbells tinkling from the basalt villages of the Velay, 3000 feet above sea level. |
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She also has participated in the collection and processing of paleomagnetic drill cores from basalt flows in Iceland. |
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Like a miniature version of Earth's plate tectonics, thin slabs of basalt crust jostle about, driven by the heat below. |
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The occurrence of penecontemporaneous flood basalt volcanism in the region further suggests that the uplift was caused by a rising mantle plume. |
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This panoramic river area, with its soaring basalt cliffs and striking golden hills, has become a desirable area for vacationers. |
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Under a thin Jurassic conglomerate a Palaeozoic succession of interbedded reddened sandstone, mudstone and basalt was preserved. |
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The presence of basalt and obsidian is a sign of volcanic activity and the instability of the earth's crust in this area. |
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Also, the basalt, directly above the chalk, is locally capable of supporting all the calcicolous species that chalk can support. |
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Animals begin to colonize the basalt volcanoes when they are still deep beneath the sea surface. |
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Food is prepared in an umu, an oven dug in the earth and filled with firewood and basalt rocks. |
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In my wanderings around the hills I had found a mortar and pestle, a moccasin last and a canoe anchor, each fashioned from basalt. |
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The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase. |
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Neither had iron tools and instead used such hard stones as flint, jade, dolerite, basalt, and serpentine to make axes, knives, and chisels. |
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If was used to imitate Josiah Wedgwood's rosso ant-leo and black basalt stoneware and was often decorated. |
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Some are made up of dense, black, homogeneous basalt, with no visible mineral grains. |
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At ground level, a bistro and book shop have been elbowed aside to create a senselessly spacious foyer, floored in black basalt. |
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Some areas of this lava formation are highly mineralized, whereas other equally large areas are hard, solid black basalt without any minerals. |
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It includes a variety of rocks, such as basalt, granite, gneiss, quartzite, slate, and schist. |
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The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas. |
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In part, the hypothesis involved tiny grains of the naturally magnetic mineral magnetite, which is commonly found in basalt. |
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Eastwards, the basalt flows become thinner and interfinger with red lacustrine or sabkha siltstones deposited in the deeper parts. |
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The basalt ashlars have protruding bosses and roughly dressed margins, which give the impression of order and unity. |
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The smooth slate floor of the bottom level reflects the rough basalt on the pathway through a preserved grove of evergreens. |
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Soils on basalt had a higher pH and were higher in most micronutrients, but lower in Iron, than soils on arkose. |
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At Babylon there is a famous basalt statue of a man being mauled by a lion. |
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A jagged piece of basalt had torn a fresh rip in the hem of her robes, and a gash from the same rock was bleeding freely. |
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Here, spectacularly large groups of scolecite, heulandite, apophyllite, and associated minerals occurred in cavities in flood basalt. |
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It can be found in fissure veins and brecciated amygdaloidal basalt lodes but not in the conglomerate lodes. |
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Here the rock formed when lava flowed into a freshwater lagoon and quickly altered into spilite basalt. |
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The Haluut Bulag melange contains lenses of limestone, sandstone, chert, tuff, minor acid volcanic material, and vesicular basalt. |
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The basalt lava in particular has been, and is still being, extensively quarried for road aggregate in many large quarries on those mountains. |
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The youngest rocks in the district are Tertiary basalt flows and tuffs. |
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Somewhere in the basalt hills a lion roared, the sound carrying through the night until another responded. |
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The powdered basalt, granite and other volcanic rock is a by-product of quarrying and hundreds of thousands of tonnes of the material is lying unused around Scotland. |
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Including such intervals into the basalt layer, we have matched the amplitudes and waveforms of many features observed in the magnetic anomaly field. |
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Here is the place to try a hot stone massage, where warm basalt stones from the desert's dry river beds are used in a deep massage to ease any knotted muscles. |
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The technique was to go slowly back and forth parallel to the shore on the basalt reef and locate any fissure veins containing copper or other minerals. |
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Massive to pillowed tholeiitic basalt, komatiitic basalt and ultramafic rocks form a series of partly overlapping lensoidal bodies with typical sigmoidal outcrop patterns. |
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The basalt, inferred to be of Miocene age, appears to be an alkali basalt that contains xenoliths of ultramafic rocks up to a few centimeters in size. |
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The minerals found in Maharashtra are mostly zeolites, some of which occur as tiny tube fillings, spherules, nodules, and patches of zeolitic material in basalt. |
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The last lava flow from the volcano were recorded in 1007 and the mountain contains many tunnels, pillars and other unusual features that formed as the molten basalt cooled. |
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Michihiro Kosuge is known throughout the region for public commissions in granite and basalt, often incorporating flowing water with the rough-hewn rock. |
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The more extreme of these were found within the fault zones separating adjacent basalt blocks, or were on north slopes below steep areas of consolidated talus. |
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The lithology of the bedrock can vary from basalt to sandstone and various carbonate rocks, but most caves form through the dissolution of limestone. |
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Vulcanites, such as basalt and fire opal, will be formed within erupted magma where cooling is rapid and only tiny crystals have the chance to form. |
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Most of the Moon's iron-rich basalt maria occur on the near side as well, where they alternate with highlands having only moderate concentrations of iron. |
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When wet, the basalt changes colour from silvery grey to gleaming black. |
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The fine-grained basalt stoneware reflected Wedgwood's Neoclassicism. |
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Standing at the centre of the memorial are six large basalt obelisks etched with the names of all the countries where Australians have been held prisoner of war. |
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The Haluut Bulag melange is dominantly sedimentary with lenses of bedded limestone, sandstone, siltstone, and locally vesicular basalt, enclosed in a matrix of pelitic schist. |
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The volcanic necks are composed of basic rocks, basalt, basalt breccia, or andesite, showing considerable variation in mineralogy, texture, and structure within the same neck. |
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The area is covered with layers of basalt, porous volcanic rock that has been collecting rain and snowmelt in underground aquifers for millions of years. |
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All basalt chemical compositions can be plotted in the basalt tetrahedron, which has normative quartz, olivine, nepheline and augite at the apices. |
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The chemical nature of these hydrothermal solutions was determined by the composition of the basalt, the length of contact with the basalt, and the temperature. |
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Entablatures and colonnades are common structural features of basalt. |
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Folded sediments of pink-brown rock rise on either side, broken at intervals by dark basalt columns of solidified magma and occasional leopard caves. |
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The reference to emerald stone probably indicates color rather than medium, which suggests that the statue was carved of green basalt, granite, porphyry, or serpentine. |
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At the Qing Yin power station section, the lower half of the basalt sequence is continuously exposed in a river course and adjacent road cuttings. |
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The sulfur at El Desierto occurs in a whitish to grayish Pliocene tuff, consisting mostly of hardened, chiefly andesitic to dacitic, volcanic ashes, and capped by basalt. |
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Typical protective walls and winery's house from basalt stones in the west of the island of Pico. |
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This is how the Salisbury Crags formed and became basalt cliffs between Arthur's Seat and the city centre. |
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The basalt underpinnings of Trotternish produce a diversity of Arctic and alpine plants including alpine pearlwort and mossy cyphal. |
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The microstromatolites and the surrounding basalt were overlaid by fungal cells and hyphae. |
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Note how the microstromatolite and surrounding basalt are overgrown by the biofilm and how hyphae protrude. |
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The Faroe Islands are dominated by tholeiitic basalt lava, which was part of the great Thulean Plateau during the Paleogene period. |
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Four suites of mafic rocks are present, namely picritic lapilli tuff, basaltic to andesitic lapilli tuff, low-Cr basalt, and andesitic basalt. |
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Basalt fiber is a material made from extremely fine fibers of basalt, which is composed of the minerals plagioclase, pyroxene and olivine. |
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Visit Fingal's Cave on the island of Staffa, Inner Hebrides, to see the stunning hexagonally jointed basalt columns. |
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The two holes were drilled from a new platform in an area of coincident gold-in-soil anomalies and potassic alteration of basalt. |
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These are rare, because it is difficult to turn basalt into granite via fractional crystallisation. |
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The area is characterized by fertile farmland and mostly wooded basalt peaks, many of which are topped by mediaeval castles or castle ruins. |
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These igneous rocks consists of serpentine, greenstone and basalt, typical of rocks in southeastern regions of the Arabian Peninsula. |
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The remains of this violent origin can be seen in the basalt of the surrounding hills. |
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The subducting basalt and sediment are normally rich in hydrous minerals and clays. |
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Long ridges of basalt, such as that between Cauldron Snout and Lonton may indicate the presence of surface fissure eruptions. |
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In the more slaggy parts of the sheet pale yellowish natural porcelain is found both fused to blocks of basalt and as large lumps in the filling. |
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Before long, as Dawson pointed out, Sorby also made thin sections of some of the fused charges of basalt produced by Sir James Hall. |
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Correctly speaking, Hawaiian basalt is not just basalt, but is a special variety enriched in silica known as tholeiite. |
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They are built from a different kind of lava, much gummier than that of the free-flowing tholeiitic basalt. |
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The northern peninsula of Trotternish is underlain by basalt, which provides relatively rich soils and a variety of unusual rock features. |
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Granite, basalt, andesite and trachyte are used as coating materials for buildings. |
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A basalt statue of Ishtar wearing an embroidered gown was unearthed in Ain Dara Temple in the northern city of Aleppo. |
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Hydrous magmas composed of basalt and andesite are produced directly and indirectly as results of dehydration during the subduction process. |
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Felsic magma, such as rhyolite, is usually erupted at low temperature and is up to 10,000 times as viscous as basalt. |
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Sustained global cooling is distinguished from the temporary climatic effects of flood basalt events or impacts. |
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The final paper discusses the role of basalt stratigraphy and structure in understanding the hydrogeology of the basalts. |
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Trained as a geologist, photographer and rock hound, Toedtemeier has been photographing Northwestern basalt for 25 years. |
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Mafic, basalt sea floors and other geological products of 'normal' plate tectonics were not included in the definition. |
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When the Earth's field reverses, new basalt records the reversed direction. |
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An example is found in an early basalt road by the Temple of Saturn on the Clivus Capitolinus. |
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The Walvis Ridge is one of few examples of a hotspot seamount chain that links a flood basalt province to an active hotspot. |
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During the first stage the volcano erupts basalt of various types, caused by various degrees of mantle melting. |
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Even when you've spent an hour grinding the warmed nibs to a smooth paste on your basalt metate, it won't dissolve. |
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The basalt was also piled to outline large squares in the ceremonial centres known as heiaus. |
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The Shiant Isles and St Kilda are formed from much later tertiary basalt and basalt and gabbros respectively. |
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Flood basalt events occur as pulses of activity punctuated by dormant periods. |
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The walls are built with basalt blocks that have been weathered and broken up and stacked without mortar. |
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Gabbro intrusions of the Cobequid Shear Zone are of olivine tholeiite composition and appear geochemically related to the basalt. |
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The joints which divide the sandstone contrast finely with the divisional planes which separate the basalt into pillars. |
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Within the rugged terrain serpentinized peridotite and gabbro are capped with a thin layer of extrusive basalt. |
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The mountains are granite, sandstone, limestone with karst areas, and basalt formations. |
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New magma of basalt composition emerges at and near the axis because of decompression melting in the underlying Earth's mantle. |
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Less common is basalt, a denser volcanic rock that is the primary constituent of the ocean floors. |
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Magma that reaches the surface to become lava cools rapidly, resulting in rocks with small crystals such as basalt. |
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Its slopes are an angular patchwork of snowfields, lava-strewn plains, basalt pinnacles, and looming cinder cones. |
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The flow is a coarse-grained, ophitic basalt containing heavily altered plagioclase and relatively unaltered clinopyroxene. |
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The borehole of Chuahit, located 3 km SE of Chuahit town revealed the existence of 3 m thick clay layers within the basalt. |
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Over the same period, approximately 70 percent of the sulfides originally present in the basalt have dissolved. |
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Most of the nests are constructed on precarious perches nestled in the virtually vertical cliffs of the basalt and conglomerate. |
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Unit G is composed of sparsely to moderately porphyritic basalt, with gabbroid xenoliths, plagioclase glomerocrysts and olivine microphenocrysts. |
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Some kinds of basalt solidify to form long polygonal columns. |
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The extreme PBI came from one location with basalt lithology that was not included in the present analysis, as the PBI lay well outside the range used by Gourley et al. |
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Diyarbakir boasts numerous medieval mosques and madrassahs, crowned by the 11th Century Ulu Cami constructed by alternating bands of blacks basalt and limestone. |
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Another exhibit is a basalt and gold amulet in the shape of a scarab beetle, with a blank space on the back where the buyer's name could be written. |
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Continental rifting commonly follows flood basalt volcanism. |
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These flood basalt eruptions have resulted in large accumulations of basaltic lavas emplaced at a rate greatly exceeding that seen in contemporary volcanic processes. |
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The upper basalt layers of older LIPs may have been removed by erosion or deformed by tectonic plate collisions occurring after the layer is formed. |
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Silicate rocks used in this experiment were basalt, dolerite, gneiss, and K-feldspar from Bunbury, Jarrahdale, Northam, and Fort Hedland, Western Australia, respectively. |
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Igneous rocks such as granite and basalt also often form cliffs. |
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Igneous activity between 350 and 400 million years ago, coupled with faulting, led to the creation of tough basalt volcanic plugs, which predominate over much of the area. |
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The massive sulphide zones are hosted at the contact between mafic pillow lavas and massive basalt, and have been classified as volcanogenic massive sulphide deposits. |
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For instance, a granite that is formed from melted sediments may have more alkali feldspar, whereas a granite derived from melted basalt may be richer in plagioclase feldspar. |
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The objects found in these researches are in the museum, the most notable being a great basalt bull, probably once an object of cult in the Serapeum. |
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Towards the Andes, the shingle gives place to porphyry, granite, and basalt lavas, animal life becomes more abundant and vegetation more luxuriant. |
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Sulfur, chlorine, and fluorine gasses could have been released into the atmosphere from eruptions spewing out of large fissures, which is common in basalt flood formation. |
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He watched with a chill of wonder the basalt mask splotched with ivy shadow whose round eyes stared back with Kolonian penthos, Dushara with his face among leaves. |
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The inner trench slope of these convergent margins exposes the crust of the forearc, including basalt, gabbro, and serpentinized mantle peridotite. |
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A drilling expedition towards the Earth's centre would mean digging through sediment, a layer of basalt, and then hit the gabbroic layer, which lies directly above the mantle. |
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The project geologist reports that mutiple zones of basalt containing quartz-carbonate veining, chlorite alteration and variable epidote and silicification were intersected. |
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Volcanic or extrusive rocks result from magma reaching the surface either as lava or fragmental ejecta, forming minerals such as pumice or basalt. |
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The Black Cuillin, which are mainly composed of basalt and gabbro, include twelve Munros and provide some of the most dramatic and challenging mountain terrain in Scotland. |
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The impact caused fusion of basalt with meteoritic material. |
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Views are framed and filtered through craggy clusters of rock, while around the building retaining walls of shaped black basalt demarcate spaces and changes of level. |
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Mineralization occurs along an apparent structural zone in Tertiary basalt, and to some extent in the Tertiary fanglomerate beneath the volcanic rocks. |
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The original basalt flows occurred 128 to 138 million years ago. |
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Even natural geologic features such as the massive basalt columns of the Giant's Causeway on the coast of Northern Ireland were attributed to construction by giants. |
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Minor intrusions of rhyolite and basalt have been located to the north. |
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