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|
| Author |
Message |
| 25 new of 563 responses total. |
keesan
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response 218 of 563:
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Jan 26 13:05 UTC 2006 |
If you teach in the winter, Jim could take the class. This year he is taking
geology.
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bhelliom
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response 219 of 563:
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Jan 26 14:56 UTC 2006 |
I'd certainly welcome Jim if he wanted to take the class. How does he
like the geology course?
resp:217 - It would be nice, but I'm only going to be a part-timer. :)
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keesan
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response 220 of 563:
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Jan 26 16:22 UTC 2006 |
They are learning to identify rocks, but it is not clear to him what is the
distinction between a mineral and a rock yet. (re 219).
|
rcurl
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response 221 of 563:
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Jan 26 16:34 UTC 2006 |
Rocks are aggregates of different ususally crystalline minerals. Minerals
each have a (nearly) unique chemical composition (and crystal form).
Rocks, being mixtures, do not.
("Rock" is a term also used informally or in some vernacular for largish
lumps of mineral mattter, or for gems, or as a synonym for "stone", or for
some types of music or the response to such music.)
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twenex
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response 222 of 563:
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Jan 26 16:37 UTC 2006 |
I don't know whether the fact that you set down that last bit apparently
WITHOUT irony is hilarious or scary.
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rcurl
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response 223 of 563:
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Jan 26 16:43 UTC 2006 |
Nothing is necessarily "apparent".
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tod
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response 224 of 563:
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Jan 26 17:19 UTC 2006 |
My mom is aparent
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kingjon
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response 225 of 563:
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Jan 26 17:26 UTC 2006 |
I took a geology/astronomy course my last year of high school (I had to take
*some* science course, and I couldn't get into physics because of scheduling
conflicts). It was much too easy (except for the part with the rock and mineral
identification, which I have *no* aptitude for).
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marcvh
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response 226 of 563:
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Jan 26 17:33 UTC 2006 |
There's some basis in truth for the characterization of "rocks for jocks",
alas.
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slynne
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response 227 of 563:
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Jan 26 18:06 UTC 2006 |
I am taking an online geography class. wooo.
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rcurl
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response 228 of 563:
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Jan 26 18:13 UTC 2006 |
U of M dissolved its Geography program many years ago. Many schools have -
despite the importance of geography in land use planning, geodesy, and
many other applications. Where are you taking the geography class?
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slynne
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response 229 of 563:
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Jan 26 18:18 UTC 2006 |
Eastern Michigan has it available as an online course.
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keesan
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response 230 of 563:
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Jan 27 05:10 UTC 2006 |
Is sandstone composed of more than one mineral? He thinks some rocks have
only one mineral in them.
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bru
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response 231 of 563:
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Jan 27 05:40 UTC 2006 |
sandstone is sedimentary rock.
Igneous is formed from lava
metamorphic is transformed by heat and pressure
sedimentary is laid down by deposits.
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jadecat
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response 232 of 563:
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Jan 27 14:02 UTC 2006 |
IHB- it's Friday. :)
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keesan
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response 233 of 563:
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Jan 27 16:21 UTC 2006 |
Igneous can be formed underground, in which case it is not lava, I think.
Do we have a geology conference yet?
|
remmers
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response 234 of 563:
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Jan 27 17:58 UTC 2006 |
Why do we need a geology conference when we can put geology stuff in the
happy item?
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rcurl
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response 235 of 563:
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Jan 27 18:07 UTC 2006 |
Sandstone consists *mostly* of quartz (silica). However the three major
sedimentary rock types, sandstones (mostly sand), shale (mostly clay), and
limestone (mostly calcite) grade into one another. Hence you can have
sandy (arenaceous) shale and limestone, clayey (argillaceous) sandstone
and limestone, and limey (calcareous) shale and sandstone. Sandstone often
comes from the breakdown of granites, which can also provide other mineral
particles to the sandstone, such as feldspars and other minerals.
Igneous rocks are divided into volcanic (extrusive - formed at the
surface) and plutonic (intrusive - injected at depth).
Metamorphism - alteration under heat and pressure - changes sedimentary
rocks into metamorphic rocks. Sandstone --> quartzite (if dominantly
quartz to start with), shale --> slate --> phyllite --> mica schist, and
limestone --> marble. Igneous rocks can also be metamorphized.
|
nharmon
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response 236 of 563:
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Jan 27 18:15 UTC 2006 |
You guys missed another important rock. Its formed when sugar and water
is superheated and crystalizes onto a surface, usually a string.
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rcurl
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response 237 of 563:
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Jan 27 18:17 UTC 2006 |
Re #234: geologists take it for granite that geology rocks. Happiness is a
gneiss day on a rock pile.
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jadecat
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response 238 of 563:
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Jan 27 18:50 UTC 2006 |
owww
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tod
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response 239 of 563:
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Jan 27 19:11 UTC 2006 |
re #237
Are you stoned?
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mcnally
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response 240 of 563:
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Jan 27 19:51 UTC 2006 |
re #236: I thought you were going to say cocaine and baking soda..
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richard
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response 241 of 563:
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Jan 27 21:25 UTC 2006 |
IHB this weekend is the lunar/chinese new year, which will mean big
festivities here in the Chinatown neighborhood. It is going to be lunar year
4704, the Year of the Dog. Which will mean many many dogs in the big parade
down Canal St. on Sunday. For the new year, dogs will rule!
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tod
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response 242 of 563:
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Jan 27 21:28 UTC 2006 |
Hey richard...
Did you hear about that guy on Linden complaining that his 3rd floor apartment
was getting ruined by the prospect of a strip club in the boarded up
storefront below?
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