作者kate110548 (雯^o^)
看板b942040XX
标题[课业] 地球历史小考题目
时间Sat Apr 14 13:31:02 2007
可能可以当重点的参考吧!!
不然课本我真的不想看~~
大家加油~~
Ch5
1. what is the dropstone?
2. why is the fluvial sequence containing coarse to fine
alternating sub-sequences?
3. what is the reason to form the distinct layers in varves?
4. write down possible sedimentary environments, which is
dominated by biogenic sediments?
5. why do we still have sandy deposits in the deep sea?
Do you know where they are? What is the specific name of
this sedimentary environment?
Ch6
1. how are strontium isotopes useful in dating rock?
2. why does a geologic formation not necessarily have an
upper of lower boundary that is the same age everywhere?
3. what is the scientific contribution of event stratigraphy?
4. what factors lead to imperfections in radiometric dating?
Ch8
1. what are the major differences between crust and lithosphere?
2. write down the lines of evidence which support the theory of
continental drift.
3. where can we find volcanism? Why?(answer based on plate tectonics).
Ch9
1. what is molasses? Why does it normally accumulate after flysch?
2. what is the significance of ophiolites?
3. how can mountain chain form without continental collision?
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1F：推 mollypp:谢谢你~~~我有几份不小心都交回去XD 04/14 21:39
2F：推 ShawSean:我每一分都很乖地交回去 XD 04/14 21:40
3F：→ saichaos:怎麽才34块钱@@? 04/15 13:31
4F：推 will1118:谢谢 XD 04/15 13:41
5F：推 kate110548:课本的量好多= = 楼楼上有种东西叫复制贴上XD 04/15 17:56
6F：推 mollypp:第六章的第一题 原理是什麽呀@@ 04/15 20:41
7F：推 ShawSean:我现在才发现我好像没拿到第六章的考卷 Orz 04/15 20:50
8F：推 mollypp:我那堂请假呀~~~~~~~~~阿呜~那到底是啥呀 04/15 21:26
9F：推 ShawSean:看不太懂那题要问的到底是how还是why？ 04/15 21:44
10F：推 mollypp:那关键是在他可以定新生代的地层吗~ 04/15 21:56
11F：推 ShawSean:关键在它半衰期很长只能定千万年以上吧？ 04/15 22:04
12F：推 ShawSean:喔喔，看错。你说的应该是对的。 04/15 22:07
13F：推 smayel:Sr的用法类似氧同位素定层 04/15 23:50
14F：→ smayel:之所以在新生代可以用是因为海洋岩芯都在新生代 04/15 23:50
15F：→ smayel:洋底沈积物很难打到5ma之前的 04/15 23:51
16F：推 mollypp:了解了 感谢楼上~~~ 04/16 01:21