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Geisenoceras Fossil

PRODUCT TYPE: Fossil

One geisenoceras fossil. Small specimens are displayed in an acrylic case. Large specimens will come in a cloth drawstring bag.

A perfect addition for your fossil collection.

 

Images of the specimens are representative of our currently inventory. You'll likely receive a different—but similar—specimen. We prioritize sending the biggest specimens of the chosen size first.

 

 

 

$12.00

Small (1”-2”)
Large (>2")

Pickup available at our Tulsa Storefront

Usually ready in 24 hours

Geisenoceras Fossil

Small (1”-2”)

FOSSIL DETAILS
TIME SCALE
further research
CUSTOMER REVIEWS
FOSSIL DETAILS

Specimen: Geisenoceras Fossil

Genus/Species: Geisenoceras
Era: Devonian
Age: 400 Ma
Location: Morocco
Size: 1"-2"

Notes:

TIME SCALE

This table contains the geological time periods of the past 2.5 billion years on Earth to aid in understanding age immense age of these fossils.

(Ma = Mega-annum = 1,000,000 years)
EON ERA PERIOD EXTENT (Ma) DURATION (Ma)
Phanerozoic Cenozoic Quaternary 2.588–Present 2.588+
Neogene 23.03–2.588 20.4
Paleogene 66.0–23.03 42.9
Mesozoic Cretaceous 145.5–66.0 79.5
Jurassic 201.3–145.0 56.3
Triassic 252.17–201.3 50.9
Paleozoic Permian 298.9–252.17 46.7
Carboniferous 358.9–298.9 60
Devonian 419.2–358.9 60.3
Silurian 443.4–419.2 24.2
Ordovician 485.4–443.4 42
Cambrian 541.0–485.4 55.6
Proterozoic Neoproterozoic Ediacaran 635.0–541.0 94
Cryogenian 850–635 215
Tonian 1,000–850 150
Mesoproterozoic Stenian 1,200–1,000 200
Ectasian 1,400–1,200 200
Calymmian 1,600–1,400 200
Paleoproterozoic Statherian 1,800–1,600 200
Orosirian 2,050–1,800 250
Rhyacian 2,300–2,050 250
Siderian 2,500–2,300 200
further research
GEISENOCERAS

Geisenoceras is an extinct cephalopod, similar to a squid with a long, pointed shell that lived during the Devonian period around 400 million years ago.

The lighter areas were cavities in its shell that it used for bouyancy and propusion in the water. The dark portion is the surrounding rock that the fossil was embedded in.

For many years, scientists thought this and many similar specimens were all one species called Orthoceras regulare.

But it was eventually discovered that there were in fact over 2,500 unique, conical-shelled, nautiloid species in the fossil record, and sorting the taxonomic record became quite an intensive undertaking.

This is an example of scientific progress. Often when we hear about scientists being wrong, it’s being reported in the news as a failure. On the contrary, being proven wrong presents an opportunity to learn something new. Progress can only occur where we have room to grow, and finding faults in our thinking illuminates areas of potential advances, but only if we adapt to the new information.

CUSTOMER REVIEWS

Customer Reviews

Based on 2 reviews
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G
G.P. (Wyoming, United States)

Geisenoceras Fossil

A
A. (Michigan, United States)
Gorgeous!

Really beautiful specimen! Excited to add to my collection

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Geisenoceras Fossil

Geisenoceras Fossil

$12.00
Small (1”-2”)
Large (>2")