After-reading tasks.
Date: 2015-10-07; view: 643.
TERMS
Fig. 44 Mid-ocean spreading ridge
The diagram shows how a spreading ridge grows.
1. Upwelling mantle partly melts and pushes up the oceanic crust above.
2. The bulging plate splits and a central block subsides. Molten rock rises through cracks at the block's above.
3. More molten rock plugs gaps left as tension pulls old crust apart.
4. As new crustal blocks subside, fresh cracks appear.
The process is repeated.
| to incorporate (to include/ to be part of) | включать |
| landmass | суша |
| a split | трещина, раскол |
| to create (to become) | образовывать; создавать |
| to thin (away) | выклиниваться |
| to occur (to happen) | происходить |
| growth (development) | рост (развитие) |
| molten (rock) | расплавленная (порода) |
| to rise from beneath (below) | подниматься |
| to be tugged apart | тянуть с усилием (натяжение) |
| stretch(-ing) | растягивать (растяжение) |
| chunk | кусок; глыба |
| gap | зазор, промежуток, разрыв |
| to plug | закупоривать |
| to well up | изливаться |
| to stick | прилипать |
| spreading (ridge) | спрединговый (хребет) |
| flank | склон, фланг |
| upwelling | излияние |
| rift (valley) | рифт, рифтовая долина |
| injection | внедрение, инъекция |
| creep (outward) | сползание, оползание породы |
| transform fault | трансформный разлом |
| offset | смещение, сдвиг |
| to subside | оседать; опускаться |
| tension | напряжение, растяжение |
| to sink | опускаться; погружаться |
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| DETAILED READING: Sea-floor spreading | | | Put the facts in the correct order which shows how sea floor spreading develops. |