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| Author |
Message |
| 25 new of 563 responses total. |
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?
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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.
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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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marcvh
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response 243 of 563:
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Jan 27 21:34 UTC 2006 |
How tall are those poles again?
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rcurl
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response 244 of 563:
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Jan 27 22:10 UTC 2006 |
How is the date of the Chinese New-Years-Day determined?
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richard
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response 245 of 563:
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Jan 28 00:59 UTC 2006 |
re #244 I asked that question to google. google is your friend:
"The date of the Chinese New Year is determined by the Chinese
calendar. Chinese New Year starts on the first day of the new year
containing a new moon (some sources even include New Year's Eve) and
ends on the Lantern Festival fourteen days later. This occurs around
the time of the full moon as each lunation is about 29.53 days in
duration. In the Gregorian calendar, the Chinese New Year falls on
different dates each year, on a date between January 21 and February
21."
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rcurl
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response 246 of 563:
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Jan 28 07:05 UTC 2006 |
As stated, this seems circular. Do I presume that the "first day of the new
year" refers to a Gregorian new year? If so, this is not an independent
definition of the Chinese New Year. It seems strange to me that the Chinese
calendar would be forced to be synchronized to the Gregoria New Year.
Or is the "first day of the new year" is the date following the Winter
Solstice on which a new moon occurs? That would make sense (then why don't
they say so?).
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aruba
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response 247 of 563:
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Jan 30 04:06 UTC 2006 |
It can't be what you said, Rane, because then it would be possible for the
new year to begin in December.
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rcurl
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response 248 of 563:
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Jan 30 07:33 UTC 2006 |
You are right. There is an explanation at
http://webexhibits.org/calendars/calendar-chinese.html
but I haven't tried to understand it yet. I looked especially for the
calculation of the start of each new year, but that isn't stated explicitly
(as far as I could tell).
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twenex
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response 249 of 563:
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Jan 30 08:05 UTC 2006 |
Re: #245. You mean you asked that question OF google.
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aruba
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response 250 of 563:
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Jan 30 19:40 UTC 2006 |
Re #248 - That's an interesting site, Rane - thanks. Calculating the
calendar seems to be very complicated. It was also interesting that the
names of years repeat every 60 years, and that the names are described by
two cycles of length 12 and 10. There is a famous theorem in number theory
called the "Chinese Remainder Theorem", which generalizes the principle that
all the year-names will be used in 60 years. I wonder if that's why the
theorem is called that.
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fitz
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response 251 of 563:
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Jan 31 20:47 UTC 2006 |
I replaced the outside door lock and it only took one additional trip to the
hardware store. This door must have had a skeleton lock and then was fit
with some adaptor kit to span the huge cavern I found when I took off the
cylinder lock.
I had to use my hacksaw for the first time in years: I feel as if I
actually did something
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tod
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response 252 of 563:
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Jan 31 21:00 UTC 2006 |
YAY
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