Fortunately, a surge of public support and volunteer energy prompted restoration of 72 miles of dikes and channels. |
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Based on the position of the dikes, where was the source of the magma for the laccoliths located? |
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With their gently sloping sides, Sanxingdui's walls may instead have been dikes for flood control. |
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Volunteers have reinforced dikes along the Elbe River and sandbagged their homes and businesses trying to avoid a deluge. |
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Dolerite is basaltic magma that solidifies rapidly in sills and dikes near the surface. |
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The need to build dikes was a key factor in causing the early settlers to request status as a municipality. |
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Wingrock soils are on low fan terraces below volcanic necks and associated dikes. |
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In some cases, concrete and stone retaining walls and dikes are erected along banks to stave off overflow in heavy rain. |
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Even today the Dutch are famous for impoldering, building dikes and all kinds of water control. |
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The seismic data show faulting of the subsurface sediments, possibly as dikes were injected into the center of the basin. |
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Erosion of the rocks around the dikes created Arizona's richest placer deposits, and the site of Arizona's greatest gold rush. |
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A swarm of mafic igneous dikes have intruded the Estes pegmatite and make a showy display in the quarry face. |
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Much of the western part of the country is polders that have been reclaimed from the sea by dikes and dunes. |
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During this time, many of the district's steeply dipping, northeast-trending faults were intruded by narrow, granodiorite porphyry dikes. |
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Therefore, if runoff can be diverted away from it with dikes and interception ditches, sediment transport can be reduced. |
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By the 1920S, the Army Corps of Engineers built sturdier dikes, and valley flooding virtually ceased. |
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He is remembered as a benevolent ruler who increased agricultural production and built dams, dikes, and bridges for the Vietnamese people. |
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We have pumps to pump out the water that is continually leaking into our polders through the dikes. |
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The busy prehistory is known rather than seen in the shadow remnants of dikes and earthworks. |
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Ponds are separated by dikes that prevent flooding and provide access routes to the ponds for electricity and aerator motors. |
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These granite dikes are composed almost totally of potassium feldspar and quartz. |
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Because of the freeze-and-thaw cycle, concrete dikes tend to require annual maintenance to seal cracks and remain watertight. |
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Evidently, the wealth of minerals found at Brumado is related to the intrusion of igneous dikes and subsequent associated hydrothermal mineralization. |
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The pegmatite dikes are very comparable chemically and mineralogically to the evolved differentiates, exhibiting similar chemical enrichments, albeit to a greater degree. |
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Other proposals included diverting some of the water from the channel with a series of dikes or reducing its power through a number of small waterfalls. |
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The ditches, dikes and reed-edged fleets that crisscross the grazing marshes here are rich in invertebrates, including the scarce emerald damselfly. |
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Local authorities were ordered to step up patrols along dams and dikes. |
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The only known igneous rocks in the area are Permian periodotite and lamprophyre dikes as well as diatremes of ultramafic composition associated with the Fluorite district. |
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There's also something called the Klamath Straits Drain, along with scores of channelized creeks, uncountable dikes, and an aqueduct called the Lost River Diversion Channel. |
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The barren soil along the edge of the dikes proved fertile ground for mustard, tumbleweeds, and other plants that the refuge managers and farmers considered pests. |
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Many such dikes in western Maine are classified as alkali diabase. |
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Only dikes and trenches were allowed to separate the two types of farms. |
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Acadian farms, dependent on dikes and the development of marshland, were self-contained and achieved high levels of production of cereals and apples, and then of livestock. |
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Before the construction of dams and barrages, floodwaters would spill out of the river's banks and, channeled by sluices and dikes, cover most of the agricultural land. |
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As they camped in the fields in sight of the city walls the Mongols surprised them by smashing the dams and dikes nearby and flooding the encampment. |
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The copper containing dikes are derived from a larger magma chamber with a similar composition and copper content. |
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The large scale project involves the construction of three bridges, new dikes and concrete water barriers. |
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Since the late 16th century, large polder areas are preserved through elaborate drainage systems that include dikes, canals and pumping stations. |
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As the ground level dropped, the dikes by necessity grew and merged into an integrated system. |
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Typical intrusive formations are batholiths, stocks, laccoliths, sills and dikes. |
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Hypabyssal rocks are less common than plutonic or volcanic rocks and often form dikes, sills, laccoliths, lopoliths, or phacoliths. |
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According to the Mammal Society and the Dutch Water Board, this will cause a threat to the river dikes. |
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Different types of intrusions include stocks, laccoliths, batholiths, sills and dikes. |
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Igneous intrusions such as batholiths, laccoliths, dikes, and sills, push upwards into the overlying rock, and crystallize as they intrude. |
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In contrast to magmatic dikes, a sill is a magmatic sheet intrusion that forms within and parallel to the bedding of layered rock. |
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Sedimentary dikes or clastic dikes are vertical bodies of sedimentary rock that cut off other rock layers. |
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Beginning in the 17th century, dikes were built further out to reclaim more land. |
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Some of which have been disconnected for vessels from the main stream by dikes. |
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From the early 16th century, a number of dikes were built against the storm floods and to gain arable land. |
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The bog was affected by high floods, and dikes built on the bog proved to be very fragile. |
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The population of the eastern, remaining part of Strand, the modern Nordstrand, did not succeed in rebuilding the dikes on their own. |
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Built mostly behind dikes, large parts of the Rotterdam are below sea level. |
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The defences took the form of a moat and earthen dikes, with gates at transit points, but otherwise no masonry superstructures. |
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These are formed where magma pushes between existing rock, intrusions can be in the form of batholiths, dikes, sills and layered intrusions. |
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In many spots in Scandinavia basaltic dikes are found with ages between 670 and 650 million years. |
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In Newfoundland and Labrador, the Long Range dikes are also thought to have formed during the formation of the Iapetus Ocean. |
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Sills are fed by dikes, except in unusual locations where they form in nearly vertical beds attached directly to a magma source. |
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Small dikes of granitic composition called aplites are often associated with the margins of granitic intrusions. |
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Honorius, however, refused to see beyond his own safety, guaranteed by the dikes and marshes of Ravenna. |
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Don Fadrique's army later attempted to besiege Alkmaar but the rebels won by opening the dikes and routing the Spanish troops. |
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These rocks are intruded by metamorphosed gabbro, diabase, and felsic dikes and sills and granite intrusions. |
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Sweet potato is relatively easy to propagate, and in rural areas that can be seen abundantly at canals and dikes. |
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During wartime the high dikes of the Yellow River were sometimes deliberately broken in order to flood advancing enemy troops. |
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At depth, some kimberlite breccias grade into root zones of dikes made of unfragmented rock. |
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Some intrusive rocks solidified in fissures as dikes and intrusive sills at shallow depth and are called subvolcanic or hypabyssal. |
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Plutons include batholiths, stocks, dikes, sills, laccoliths, lopoliths, and other igneous formations. |
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The JQS prospect to the south is underlain by volcanic agglomerates which have been intruded by diorite dikes and stocks. |
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Mineralization is hosted by Late Cretaceous andesite intruded by porphyry stocks and dikes. |
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Late in its orogenic history, the region was intruded by granite and syenite batholiths, plutons and related pegmatite dikes. |
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Aside from these, river channel desiltations, dredgings, restoration of dikes and the construction of bridges and classrooms were done. |
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Both pegmatites remain open at depth and future drilling in the upcoming work program will attempt to extend the depth of the dikes to a minimum of 100 meters. |
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Gold mineralization is hosted in silty carbonate rocks associated with altered lamprophyre dikes and high levels of arsenic, antimony, mercury and thallium. |
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An alternate view is that plutons commonly are formed not by ascent of large magma diapirs, but rather by aggregation of smaller volumes of magma that ascend as dikes. |
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Sabotage of dikes, canals, and reservoirs and deliberate flooding of rival states became a standard military tactic during the Warring States period. |
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This includes sedimentary bedding, faults and fractures, cuestas, igneous dikes and sills, metamorphic foliation and any other planar feature in the Earth. |
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This required the oil companies to build dikes and drain the land in order to build their facilities, Dutch Shell takes credit for some of the most enduring dike systems. |
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They consist of several to hundreds of dikes emplaced more or less contemporaneously during a single intrusive event, and are magmatic and stratigraphic. |
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A dike swarm is a large geological structure consisting of a major group of parallel, linear, or radially oriented dikes intruded within continental crust. |
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Sometimes dikes appear in swarms, consisting of several to hundreds of dikes emplaced more or less contemporaneously during a single intrusive event. |
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Magmatic dikes form when magma intrudes into a crack then crystallizes as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. |
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This can result in the emplacement of dike swarms, such as those that are observable across the Canadian shield, or rings of dikes around the lava tube of a volcano. |
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The main problem is that beavers excavate corridors and caves in dikes, thereby undermining the stability of the dike, just as the muskrat and the coypu do. |
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Some hydraulic fractures can form naturally in certain veins or dikes. |
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The Navy has programed over an incremence of 3 or 4 fiscal years, corrective measures in dikes and walls to protect their investment in this shipyard. |
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The modern form of the dikes supplemented by overflow and lateral diversion channels, began to appear in the 17th and 18th centuries, built in the Netherlands. |
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