100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary Geological history £4.49
Add to cart

Summary

Summary Geological history

 0 purchase

A summary of all major periods in geological history, covering timespan, major environmental/ climate events and extinctions, example fossil sites and lists some important taxa from each time period

Preview 2 out of 5  pages

  • August 14, 2021
  • 5
  • 2021/2022
  • Summary
All documents for this subject (30)
avatar-seller
jackdazley55
Geological Time periods


Palaeozoic
Precambrian (4500 to 541 million years ago)

- Major events: largest geological time period, spanning from the formation of the earth to
the establishment of microbial and multicellular life. Formation of the atmosphere, snowball
earth and great oxidation event.

- Fossil sites: Ediacaran hills (Australia)

- Example species: Stromatolites, Kimberella, Dickinsonia, Spriggina, Mawsonites




Cambrian (541 to 485.4 million years ago)

- Major events: Cambrian explosion, evolution of hard-bodied animals, first vertebrates.

- Fossil sites: Burgess shale (Canada), Chengjiang (China)

- Example species: Anomalocaris, Haikouichthys, Hallucigenia, Wiwaxia, Opabinia




Ordovician (485.4 to 443.8 million years ago)

- Major events: cambrian-ordovician extinction, major diversity in marine life, non-vascular
plants include mosses, red and green algae, major glaciation triggering an extinction event.

- Fossil sites: Canning Basin (Australia), Lake Winnipeg (Canada)

- Example species: Cameroceras, Conodont, Megalograptus, Crinoids




Silurian (443.8 to 419.2 million years ago)

- Major events: began with extinction triggered by ordovician glaciation, first vascular land
plants, rising sea levels resulting in new aquatic ecosystems.

- Fossil sites: Appalachian Mountains, great lakes (USA)

- Example species: Cooksonia, Cephalaspis, Brontoscorpio, Pterygotus, Megamastax

, Devonian (419.2 to 358.9 million years ago)

- Major events: ‘age of fish’ – diversification of bony fish, separation of land mass into
Euramerica and Gondwana, earth's first forests consisting of horsetails and ferns, tetrapods
first appear.

- Fossil sites: red hill (Pennsylvania), Ohio state park (Indiana), Devonian fossil gorge (Iowa)

- Example species: Dunkleosteus, Bothriolepis, Hyneria, Archaeopteris, Hynerpeton,
Gondwanascorpio




Carboniferous (358.9 to 298.9 million years ago)

- Major events: swamp forests covering much of the earth's surface, arthropod gigantism due
to much elevated oxygen levels, minor extinction at the end of the period known as the
carboniferous rainforest collapse.

- Fossil sites – Joggin (Nova Scotia), East Kirkton quarry (Scotland), Mazon Creek (Illinois)

- Example species: Arthropleura, Meganeura, Stethacanthus, Lepidodendron, Petrolacosaurus,
Pulmunoscorpius, Cacops




Permian (298.9 to 251.9 million years ago)

- Major events: diversification of reptiles, appearance of ‘mammal-like reptiles ‘ (synapsids),
appearance of the first modern trees, end of the period saw the largest extinction event in
the history of life, wiping out ~95% of species, likely caused by a warming climate and
associated oceanic changes.

- Fossil sites – Ural Mountains (Russia), Texas red beds (USA)


- Example species: Dimetrodon, Seymouria, Edaphosaurus, Diplocaulus, Inostrancevia,
Glossopteris, Coelurosauravis

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller jackdazley55. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £4.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

64232 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 15 years now

Start selling
£4.49
  • (0)
Add to cart
Added