Fossils B/C

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Re: Fossils B/C

Post by lllazar » March 28th, 2011, 6:17 pm

Marsh found 86. I don't know that, but the total number was 142 and if Cope found 56, then ya.
2011 Season Events~

Fossils (Regionals ~1st) (State ~6th)
Towers (Regionals ~1st) (State ~3rd)
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Re: Fossils B/C

Post by username1 » March 30th, 2011, 7:14 pm

What is the difference between
https://my.qoop.com/store/Photogenic-As ... 698.LG.jpg
and
http://www.geologysuperstore.com/images ... n-1398.jpg
The first is a nautilus and the second is a dactylioceras, but what are the distinguishing features?

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Re: Fossils B/C

Post by Chachalaca27 » March 31st, 2011, 1:15 pm

username1 wrote:What is the difference between
https://my.qoop.com/store/Photogenic-As ... 698.LG.jpg
and
http://www.geologysuperstore.com/images ... n-1398.jpg
The first is a nautilus and the second is a dactylioceras, but what are the distinguishing features?
Are you certain that the first is a nautilus? It doesn't resemble any nautiloid I'm familiar with, and the page title also says it's a ammonite.

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Re: Fossils B/C

Post by gneissisnice » March 31st, 2011, 1:53 pm

Chachalaca27 wrote:
username1 wrote:What is the difference between
https://my.qoop.com/store/Photogenic-As ... 698.LG.jpg
and
http://www.geologysuperstore.com/images ... n-1398.jpg
The first is a nautilus and the second is a dactylioceras, but what are the distinguishing features?
Are you certain that the first is a nautilus? It doesn't resemble any nautiloid I'm familiar with, and the page title also says it's a ammonite.
I'm actually more skeptical that the second one is dactylioceras. Basically, the defining feature is suture patterns, and both definitely seem to have nautiloid suture patterns rather than ammonoid patterns.
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Re: Fossils B/C

Post by username1 » March 31st, 2011, 6:46 pm

Ok so would these be more accurate?
Nautilus:
http://www.splashtec.com/newsitephotos/ ... per300.JPG

Dactylioceras:
http://www.freewebs.com/oldrocks/Dactylioceras.jpg


So could someone please clarify the differences? Sorry if I am missing something obvious. Thanks so much!!


Btw, for the first two, I just googled "dactylioceras fossil" and "nautilus fossil", I guess they were mislabeled?

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Re: Fossils B/C

Post by gneissisnice » March 31st, 2011, 7:48 pm

username1 wrote:Ok so would these be more accurate?
Nautilus:
http://www.splashtec.com/newsitephotos/ ... per300.JPG

Dactylioceras:
http://www.freewebs.com/oldrocks/Dactylioceras.jpg


So could someone please clarify the differences? Sorry if I am missing something obvious. Thanks so much!!


Btw, for the first two, I just googled "dactylioceras fossil" and "nautilus fossil", I guess they were mislabeled?
Well, the Dactylioceras fossil seems to look like that most often.

I guess I'd say that Nautilus has larger chambers. It's still alive today, so chances are you're gonna get more a "living fossil" for Nautilus, like http://www.google.com/imgres?imgurl=htt ... 29,r:1,s:0
2009 events:
Fossils: 1st @ reg. 3rd @ states (stupid dinosaurs...) 5th @ nats.
Dynamic: 1st @ reg. 19thish @ states, 18th @ nats
Herpetology (NOT the study of herpes): NA
Enviro Chem: 39th @ states =(
Cell Bio: 9th @ reg. 18th @ nats
Remote: 6th @ states 3rd @ Nats
Ecology: 5th @ Nats

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Re: Fossils B/C

Post by jazzy009 » March 31st, 2011, 7:50 pm

username1 wrote:
So could someone please clarify the differences? Sorry if I am missing something obvious. Thanks so much!!


Btw, for the first two, I just googled "dactylioceras fossil" and "nautilus fossil", I guess they were mislabeled?
This would be a more accurate image:

Nautilus: http://mathforum.org/mathimages/imgUpload/NAUTILUS.jpg

Your initial nautilus photo looks like a dactylioceras. Actually after checking out the site you found it on I recall seeing it last year. That is a commercial site that sells replicas of fossils for home garden-ish things. They are wrong in their naming.

In the future try to make sure the website you are using is credible. Generally commercial sites (making replicas, at that), are not extremely credible.

*Edit* sorry, gneissisnice, steppin' on your toes :D
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Re: Fossils B/C

Post by kjhsscioly » March 31st, 2011, 8:04 pm

are all nautilids in an archemedian spiral (i think that's the name...)?

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Re: Fossils B/C

Post by Flavorflav » April 1st, 2011, 7:03 am

gneissisnice wrote:
I'm actually more skeptical that the second one is dactylioceras. Basically, the defining feature is suture patterns, and both definitely seem to have nautiloid suture patterns rather than ammonoid patterns.
The ammonitic sutures in Dactylioceras appear to be visible only on the inside. It is ribbed on the outside.

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Re: Fossils B/C

Post by paleonaps » April 1st, 2011, 12:13 pm

kjhsscioly wrote:are all nautilids in an archemedian spiral (i think that's the name...)?
A fibonacci spiral? I've heard they are, but I read recently that it's a fallacy.
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