第24天 地理第三篇(mineral)
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I'd
like to begine
by thanking Dr Kane for inviting me to be here today Although I'm not a geologist. I have been collecting
mineral (矿石)for years My
collection is
rally(集会) diverse (不同的adj)because I've traveled all over the world to find them .Today ,I 've brough a few
specimens(范例,标本) for you to see ,After I discuss each one I'll pass it around so you can look at it
more closely
8 ]& }0 Y5 q0 [5 L$ G, I" e8 j As you know
feldspars(长石) are the most
aboundant minerals and are diveded into a
number of types ,These first sample are
orthoclases(正长石) ,
Notice that they
vary(变更,使多样化) in colour from white to pink to red .This glassy one is found in volcanic
rock(岩石,暗礁)—in fact I find it in New Mexico on a
collecting trip
9 d- z- b. T& g; V# o+ x This next sample that I'll pass around is
microcline(微斜长石) mineral —also call
amazomstone(天河石) You can identify it by its
bright green color. IT' often used in
jewelry and really is
quite attractive
# j4 x! N& @: u; N, e" k These final samples are all
plagioclase(斜长岩)feldspars .Many plagioclases are very
rare so I'm
particularly pround of the
variety(变化多样) in my collection .
3 S2 X( @; n& B& F9 T. s: t' I I've also brough a few slides of
some large mineral sameples and if you'll turn out the
light now I'd like to sh
ow them to you .
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在纸上写没觉得红那么刺眼,看来错的还不是一般的多,继续插刀ing
9 K5 i2 `8 y% t& d6 [/ Tps:今天跟读完,嘴有种轻飘飘的感觉,也不知是累得还是怎么,说不上好还是坏。
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本帖最后由 素不相适 于 2008-4-27 12:28 编辑 ]