| 释义 |
magmamag‧ma /ˈmæɡmə/ noun [uncountable]  magmaOrigin: 1400-1500 Latin, Greek, from massein ‘to press and mix together’ - A single deep connection to the magma supply maintains the heat input by convection.
- Different minerals in the magma create different structures.
- Eruptions can occur through either fissures or vents, again depending on magma type.
- Hot magma bubbled up through the older parts of Laurentia west of Hudson Bay, signaling the start of continental rifting.
- Igneous intrusions injected as a mobile magma may show sharp contacts with surrounding, or country, rocks.
- Pastures of fresh magma flows known as pillow lavas and the rubble of frequent earthquakes line the floor of this stone trough.
- Some attributed each crater to a bursting giant bubble of gases escaping from a vast ocean of magma.
- The south-southeast-trending increase is most probably the result of a shallow magma intrusion.
► Geologyagglomerate, nounalabaster, nounanthracite, nounasbestos, nounatoll, nounbasalt, nounbasin, nounbauxite, nounbed, nounbedrock, nounberyl, nounbluff, nouncanyon, nouncape, nouncarboniferous, adjectivechalk, nounchalky, adjectivechasm, nounclay, nouncliff, nouncoal, nouncoastal, adjectivecoastline, nounconglomerate, nouncontinental drift, nouncontinental shelf, nouncore, nouncove, nouncrag, nouncrater, nouncreek, nounCretaceous, adjectivecrevasse, nouncrust, nouncrystal, nouncrystalline, adjectivecrystallize, verbdelta, noundeposit, noundeposition, noundune, noundust bowl, nounearthquake, nounelevation, nounemery, nounepicentre, nounepoch, nounera, nounerode, verberosion, nounerupt, verbescarpment, nounestuary, nounextinct, adjectivefault, nounfeeder, nounfeldspar, nounfiord, nounfjord, nounflint, nounflood plain, nounfluvial, adjectivefold, nounfool's gold, nounfossil, nounfossilize, verbfriable, adjectivegeology, noungeyser, nounglaciation, nounglacier, nounGondwanaland, granite, noungrassland, noungroundwater, noungulf, noungully, nounheadland, nounhinterland, nounhot spring, nounigneous, adjectiveimpervious, adjectiveinactive, adjectiveinlet, nounisthmus, nounjasper, nounjet, nounkaolin, nounknoll, nounlagoon, nounlake, nounlandlocked, adjectivelandslide, nounlandslip, nounlava, nounleach, verblevee, nounlime, nounlimestone, nounloam, nounlowlands, nounmagma, nounmarble, nounmarsh, nounmarshland, nounmatrix, nounmetamorphic, adjectivemica, nounmineral, nounmineralogy, nounmining, nounmoraine, nounmorass, nounmountain, nounmountainside, nounmountaintop, nounmudslide, nounnugget, nounoasis, nounoilfield, nounore, nounoutcrop, nounpalaeontology, nounPalaeozoic, adjectivePangaea, peninsula, nounpermafrost, nounpetroleum, nounpillar, nounpinnacle, nounplate, nounplate tectonics, nounporous, adjectivepothole, nounprairie, nounprecipice, nounpromontory, nounpumice, nounpyrites, nounquartz, nounravine, nounreservoir, nounridge, nounrift, nounrift valley, nounriver, nounrock, nounrock salt, nounsand, nounsand bar, nounsandstone, nounsapphire, nounscarp, nounschist, nounscree, nounseam, nounsediment, nounsedimentary, adjectivesedimentation, nounseismic, adjectiveseismograph, nounseismology, nounsettlement, nounshale, nounshelf, nounshingle, nounsilica, nounsilicate, nounsilt, nounslate, nounstalactite, nounstalagmite, nounstone, nounstrait, nounstrata, stratified, adjectivestratum, nounsubsoil, nounsubstratum, nounsummit, nounterrain, nounthermal, adjectivetopaz, nountopsoil, nountor, nountremor, nountributary, nountrilobite, nountsunami, nountundra, nounturquoise, nounvalley, nounvein, nounvolcanic, adjectivevolcano, nounwatercourse, nounwaterfall, nounwater table, noun NOUN► chamber· These can be related to rates of magma production versus differentiation by crystal fractionation within crustal magma chambers.· Its purpose is to gather sufficient information to answer questions about magma chambers in oceanic crust.· We envisage a convecting magma chamber of height H, cooled from above.· The temperature range covers typical values expected in magma chambers.· Instead it slowly froze in a magma chamber into a mush of coarse crystals.· The concepts of crystal settling and convection in magma chambers have a long history r2-6.· The mechanism allows for great variation and complexity in magma chamber sedimentation. technical hot melted rock below the surface of the Earth |