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Re: Fossils B/C

Posted: January 31st, 2010, 12:05 pm
by emd19
What do they want by insects and crustaceans on the fossil list? I understand what I have to study for every genus, but the terms, insects and crustaceans seem too general, What do they mean by this?

Re: Fossils B/C

Posted: January 31st, 2010, 5:07 pm
by gneissisnice
emd19 wrote:What do they want by insects and crustaceans on the fossil list? I understand what I have to study for every genus, but the terms, insects and crustaceans seem too general, What do they mean by this?
Eh, you just have to be able to distinguish between an insect and everything that's not an insect. I've never actually seen questions asked about crustaceans or insects, I think they only included them so they could give you an insect trapped in amber so they could ask about preservation.

Re: Fossils B/C

Posted: February 1st, 2010, 9:59 am
by jazzy009
gneissisnice wrote:
emd19 wrote:What do they want by insects and crustaceans on the fossil list? I understand what I have to study for every genus, but the terms, insects and crustaceans seem too general, What do they mean by this?
Eh, you just have to be able to distinguish between an insect and everything that's not an insect. I've never actually seen questions asked about crustaceans or insects, I think they only included them so they could give you an insect trapped in amber so they could ask about preservation.
Definitely put in for preservation (amber and trapped in tar, carbonization, too). Naming insects shouldn't be an issue though at my first competition this year I had to identify a beetle that had been trapped in tar. I suppose they could ask the anatomy of insects and evolutionary features (wings) as well.

Re: Fossils B/C

Posted: February 1st, 2010, 11:35 am
by emd19
Obviously there is importance in amber and the distinguishing between a dino and a fly, but apart from that?

Re: Fossils B/C

Posted: February 1st, 2010, 1:53 pm
by amerikestrel
In the rules, one of the "possible tasks" they have listed is:
"a. Identify each fossil and record its mode of preservation."

How are you supposed to know how it was preserved? I mean, it's one thing if they give you an insect in amber, but what if you get fossils that are permineralized, petrified, and mineralized? How do you tell those apart just by looking?

Re: Fossils B/C

Posted: February 1st, 2010, 3:00 pm
by jazzy009
amerikestrel wrote:In the rules, one of the "possible tasks" they have listed is:
"a. Identify each fossil and record its mode of preservation."

How are you supposed to know how it was preserved? I mean, it's one thing if they give you an insect in amber, but what if you get fossils that are permineralized, petrified, and mineralized? How do you tell those apart just by looking?
Look at the wiki for a basic explanation for this. Those can be very similar, but after a while you can tell them apart. And you would pretty much only use petrification as a term for wood anyways.

Re: Fossils B/C

Posted: February 5th, 2010, 1:44 pm
by ThudBucket
why is fossils so difficult and semi frustrating:x

Re: Fossils B/C

Posted: February 5th, 2010, 1:47 pm
by ThudBucket
:ugeek: by seeing if their are crystals its crystalisation and only certen fossils can be petrifed .be permization and ect.

Re: Fossils B/C

Posted: February 5th, 2010, 1:49 pm
by ThudBucket
by seeing if their are crystals its crystalisation and only certen fossils can be petrifed .be permization and ect.
jazzy009 wrote:
amerikestrel wrote:In the rules, one of the "possible tasks" they have listed is:
"a. Identify each fossil and record its mode of preservation."

How are you supposed to know how it was preserved? I mean, it's one thing if they give you an insect in amber, but what if you get fossils that are permineralized, petrified, and mineralized? How do you tell those apart just by looking?
Look at the wiki for a basic explanation for this. Those can be very similar, but after a while you can tell them apart. And you would pretty much only use petrification as a term for wood anyways.

Re: Fossils B/C

Posted: February 5th, 2010, 2:17 pm
by courage7856
Am I the only one who is finding that everybody has their own classification for some of these fossils? I think I've found three different classes, not to mention the different orders, for Juresania. Also, Rhynconellata and Articulata are the same class, right? Just double checking. I believe Rhynconellata is more official.