时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

Portions of the San Andreas fault seem to self-lubricate with a clay layer that's deposited by fluid seeping 1 through cracks opened by fault movement


The North American and Pacific plates meet in California at the San Andreas fault. The plates grind past each other there at as much as an inch-and-a-half a year. Until the plates jam. Then energy builds up, and eventually they lurch—an earthquake.


But on some active portions of the fault, the plates tend to just creep along, without many violent jerks. All thanks, it turns out, to a little mineral lube 2, according to a study in the journal Geology.


Geologists 3 got rock cores from two miles down, at the active fault zone. They looked at those fault rocks with an electron microscope. And they found an incredibly thin coating of clay polish on the rocks.


They say that clay layer apparently 4 lubricates the plates—like greasing ball bearings—and that it's deposited there by mineral-rich water, sucked into the fault's nooks and crannies. As the fault moves, it opens new cracks for the fluid to get into, which means more lube, and more smooth creeping. A process that’s been going on for millions of years. So given enough time, parts of the fault seem to develop their own earthquake prevention mechanism 5. But for other sections, the clock’s still ticking

 



v.(液体)渗( seep的现在分词 );渗透;渗出;漏出
  • Water had been slowly seeping away from the pond. 池塘里的水一直在慢慢渗漏。 来自《简明英汉词典》
  • Chueh-hui could feel the cold seeping into his bones. 觉慧开始觉得寒气透过衣服浸到身上来了。 来自汉英文学 - 家(1-26) - 家(1-26)
n.润滑油
  • Will you supply main engine lube oil in bulk or in barrel?你供的主机滑油是散装,还是桶装?
  • Blending is the very important unit of lube oil manufacture.调和是润滑油生产工艺过程中必不可少的环节。
地质学家,地质学者( geologist的名词复数 )
  • Geologists uncovered the hidden riches. 地质学家发现了地下的宝藏。
  • Geologists study the structure of the rocks. 地质学家研究岩石结构。
adv.显然地;表面上,似乎
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
n.机械装置;机构,结构
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
标签: 60秒科学
学英语单词
accompushments
amplitude ratio-phase difference instrument
anisamide
antigedades
backbar
bashing on
bearing indication
beauvallon
boiling-water
Brevibloc
camp sheeting
candle stick
card reeler
CEW
clearing of accounts
client priority
communistled
compeed
compression of light pulse
couseranite
data flow
Dexasine
disgraciously
disprisoning
Dixonian
eat right
ecbasis
entraining plume
equity share
facultative anaerobes
family therapeutics
febris rubra
floating channel
flotation column
flys
fucko
fund remittance and transfer
gangrenous stomatitis
germylidenes
gingival separator
high energy level pile
hour-hand
human skin
impulsive neurosis
indeprehensible
indifferent air mass
insurance-relateds
intragastrically
Inverness capes
jolliment
k homogeneous grammar
kawamoto
Khvosh Maqām
lagopodous
landing over obstacle
leveraged contract in foreign exchange
Machupicchu
make sail
marine seepage
mechanical friction
midflow
nephometer
Nitropotasse
non-scene
nonlinear deformation
not good enough to
nucleolform
oletimol
ottey
P-anisidine value
phlordzinize
Ponchon-Savarit diagram
Pontchartrain, L.
precisionists
radio sensor
real-value item
recessing-tool
reduction cell
reverting
rotating cylinder (pneumatic)
sandcloth
Sap-flow
sclerospora miscanthi
scorner
secondary focusing
sell for
semi-direct fired pulverizing system
SI batch file service
snipe fish
South Whittier
stealthie
stock base
subapical initial
thomisidae
tire-pressure gauge
towell
twisting(cleland 1949)
Upper Voltans
water-sop
winter moth
XRE
zappily