Search the Community
Showing results for tags 'proterozoic'.
-
QUARTETnary - A card game about the geological time scale
paleoflor posted a topic in Members' News & Diversions
L.S., Wanted to raise some awareness on TFF because I expect many here will simply love this: A good friend of mine, Iris van Zelst (geophysicist at the German Aerospace Center in Berlin) has developed this really nice card game centred around the geological time scale: QUARTETnary The gameplay is based on the classic game Quartets (similar to Go Fish and Happy Families), where players try to collect as many sets of four cards as they can. In QUARTETnary, each of the sets represents four major events that took place during a specific geological time period. To win the game, you need to create the most complete timeline of Earth history, all the way from its formation 4.567 billion years ago to the appearance of us humans. The cards have been designed by Lucia Perez-Diaz (Earth scientist and freelance illustrator from the UK). The illustrations look amazing and I really like that they adhered to the official colour scheme of the International Commission on Stratigraphy. Iris sent me this nice set of cards for the Proterozoic: The game includes 15 sets of four cards in total (many featuring fossils): one each for the Hadean, Archean and Proterozoic eons, and one each for the 12 periods of the Phanerozoic. I expect QUARTETnary will become a really fun way to learn about and memorize the different geological units and major events in Earth history. Kind regards, Tim -
A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
- 177 replies
-
- 7
-
- achlysopsis
- acorn worm
-
(and 71 more)
Tagged with:
- achlysopsis
- acorn worm
- acrothele
- acrothele subsidua
- afon mawwdach
- agnostid
- ajax mine
- algae
- altiocculus
- altiocculus harrisi
- alum shale
- antelope springs
- anti atlas
- aphelaspis
- aphelaspis brachyphasis
- archaeocyathid
- asaphiscus
- asaphiscus wheeleri
- australia
- barrandagnostus
- barrandagnostus inexpectans
- barrios fascies
- beltane
- biwabek
- biwabek formation
- bolaspidella
- bolaspidella housensis
- bradoriid
- bradoriida
- brantevik
- british colombia
- california
- cambrian
- cambropallas
- cambropallas telesto
- canada
- chambless limestone
- chengjiang
- chengjiang biota
- china
- choia
- choiidae
- collenia
- collenia undosa
- conasauga formation
- conasauga river
- cranbrook
- cricocosmia
- cricocosmia jinningensis
- crumillospongia
- ctenopyge
- ctenopyge affinis
- cyanobacteria
- czech republic
- czechoslovakia
- diandongia
- diandongia pista
- dolgellau
- early cambrian
- east kootenay mountains
- ediacaran
- ellipsocephalid
- ellipsocephalus
- ellipsocephalus hoffi
- elrathia
- elrathia kingii
- embalse del luna
- enteropneusta
- eoorthis
- eoorthis primordialis
- ethmocyathus
- ethmocyathus lineatus
- fali
-
Origin of metazoans as recorded by small carbonaceous fossils - 2022 open access review paper
Oxytropidoceras posted a topic in Fossil News
The comprehensive, open access review paper is: Slater, B.J. and Bohlin, M.S., 2022. Animal origins: The record from organic microfossils. Earth-Science Reviews, 232, no. 104107. open access review paper A related video. Possible sponge fossils in the Tonian of northwestern Canada, Elizabeth Turner, Laurentian University, Virtual Seminars in Precambrian Geology Turner's open access paper is: Turner, E.C., 2021. Possible poriferan body fossils in early Neoproterozoic microbial reefs. Nature, 596(7870), pp.87-91. Yours, Paul H.-
- 3
-
- cambrian
- cryogenian
- (and 9 more)
-
3D documentary I have been working on for the last 3 years is finally released! It is called Ancient Planet and tells the the story of Earth from the its formation in the Hadean Eon, until the end of the Proterozoic with its mysterious Ediacaran organisms. All 3 episodes are available for watching on Tubi service, which is completely free, just requires registration: https://tubitv.com/series/300007201/ancient-planet-trilogy?start=true
-
Precambrian Slowdown in Earth’s Rotation Could Have Affected the Oxygen Content of the Atmosphere
Oxytropidoceras posted a topic in Fossil News
A Slowdown in Earth’s Rotation Could Have Affected the Oxygen Content of the Atmosphere Max Planck Institute, August 2, 2021 The open access paper is: Klatt, J.M., Chennu, A., Arbic, B.K. et al., 2021 Possible link between Earth’s rotation rate and oxygenation. 2 August 2021, Nature Geoscience. DOI: 10.1038/s41561-021-00784-3 A fascinating talk about variations in tides and non-uniform rates of change in Earth's rotation is: A journey through tides in Earth's History Mattias Green, Seds Online, Oct 22, 2000 and Blackledge, B.W., Green, J.A.M., Barnes, R. and Way, M.J., 2020. Tides on Other Earths: Implications for Exoplanet and Palaeo‐Tidal Simulations. Geophysical Research Letters, 47(12), p.e2019GL085746. Yours, Paul H.-
- atmosphere
- cyanobacteria
- (and 11 more)
-
Billion-year-old, freshwater, multicellular microfossils reported from the Torridonian sequence of the Northwest Scotland
Oxytropidoceras posted a topic in Fossil News
One Billion-Year-Old Fossil Could Be The Oldest Multicellular Animal. David Bressan, Forbes, April 30, 2021 https://www.forbes.com/sites/davidbressan/2021/04/30/one-billion-year-old-fossil-could-be-the-oldest-multicellular-animal/ The open access paper is: Strother, P.K., Brasier, M.D., Wacey, D., Timpe, L., Saunders, M. and Wellman, C.H., 2021. A possible billion-year-old holozoan with differentiated multicellularity. Current Biology. https://www.sciencedirect.com/science/article/pii/S0960982221004243 https://www.cell.com/current-biology/pdf/S0960-9822(21)00424-3.pdf https://www.researchgate.net/publication/350888013_A_possible_billion-year-old_holozoan_with_differentiated_multicellularity https://www.researchgate.net/profile/Paul-Strother Yours, Paul H.- 1 reply
-
- 1
-
- bicellum
- diabaig formation
- (and 10 more)
-
Earth's mountains disappeared for a billion years, and then life stopped evolving
Oxytropidoceras posted a topic in Fossil News
Earth's mountains disappeared for a billion years, and then life stopped evolving A dead supercontinent may be to blame By Brandon Specktor, Live Science Tang, M., Chu, X., Hao, J. and Shen, B., 2021. Orogenic quiescence in Earth’s middle age. Science, 371(6530), pp.728-731. Yorus, Paul H.-
- 2
-
- boring billion
- europium
- (and 7 more)
-
Generally accepted to be one of the earliest eukaryotes, these spiral ribbons are also the oldest macroscopic body fossils known to date. The Negaunee Fm. has been dated to 2.11 billion years old, but new studies suggest the unit is 1.87 billion years old. These ribbons are most simply referred to as a form of archaic alga, and existed when increasing oxygen levels caused global rusting of the oceans, also resulting in the extinction of other lifeforms unable to adapt to the then-toxic levels of oxygen.
- 9 comments
-
- 1
-
New research supports existence of Scottish impact crater
Oxytropidoceras posted a topic in Fossil News
Biggest Meteorite Impact in the UK Found Buried in Water and Rock https://www.sciencedaily.com/releases/2019/06/190610085903.htm https://www.livescience.com/65679-biggest-meteorite-impact-uk.html https://www.space.com/scotland-biggest-meteorite-crater-uk-discovery.html The paper is: Kenneth Amor, Stephen P. Hesselbo, Don Porcelli, Adam Price, Naomi Saunders, Martin Sykes, Jennifer Stevanović and Conal MacNiocaill, 2019, The Mesoproterozoic Stac Fada proximal ejecta blanket, NW Scotland: constraints on crater location from field observations, anisotropy of magnetic susceptibility, petrography, and geochemistry Journal of the Geological Society, https://doi.org/10.1144/jgs2018-093 https://jgs.lyellcollection.org/content/early/2019/05/09/jgs2018-093 https://pubs.geoscienceworld.org/jgs/article/570411/the-mesoproterozoic-stac-fada-proximal-ejecta Yours, Paul H.-
- 1
-
- ejecta blanket
- mesoproterozoic
-
(and 4 more)
Tagged with:
-
Methane muted: How did early Earth stay warm? University of California, Riverside, October 7, 2016 http://sciencebulletin.org/archives/6111.html https://www.sciencedaily.com/releases/2016/10/161007090659.htm http://astrobiology.com/2016/10/how-did-early-earth-stay-warm.html The paper is: Olson, S. L., Christopher T. Reinhard, and T. W. Lyons, 2016, Limited role for methane in the mid-Proterozoic greenhouse. Proceedings of the National Academy of Sciences, USA. 201608549 DOI: 10.1073/pnas.1608549113 http://www.pnas.org/content/early/2016/09/21/1608549113 Yours, Paul H.
- 1 reply
-
- greenhouse
- methane
-
(and 2 more)
Tagged with: