The Portfjeld Biota: A Doushantuo-type Lagerstätte from the Ediacaran of southern Peary Land, North Greenland.
[sciencythoughts.blogspot.com]
Remarkably detailed preservation of cells and soft tissues has been described from several Precambrian Lagerstätten, providing some of the best documented examples of early organismal evolution. Typically, this quality of preservation is made possible through several pathways, of which diagenetic phosphate replacement of originally organic material (Doushantuo-type preservation) has provided some of the most spectacular descriptions of putative Animal embryos, Acritarchs, and small shelly fossils across the Ediacaran–Cambrian boundary. Following their discovery and rise to fame in the late 1990s, the fossils from the well-known Ediacaran Doushantuo Formation of China have sparked controversy and debate, especially regarding speculative interpretation as fossil Animal embryos. However, in contrast to the widespread localities yielding macroscopic assemblages, sites yielding Doushantuo-type microscopic assemblages, which could help to resolve some of the most fundamental questions on the evolution of life and clarify the distribution of these organisms in the Ediacaran world, have proved elusive.
6
Enjoy being online again!
Welcome to the community of good people who base their values on evidence and appreciate civil discourse - the social network you will enjoy.Create your free account
Recent Visitors 15
RealisticEyes
TX, USA
Hathacat
IL, USA
tinkercreek
Portland Burb,
Notlost
Northeastern Oklahoma,
Triphid
Broken Hill,
Photos 292 More
Posted by JoeBKite-like structures in the western Sahara Desert.
Posted by TriphidAn Aussie Indigenous Message Stick.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by TriphidIndigenous Australian Aboriginal Rock art dated somewhere between 20 and 30 thousand years old.
Posted by JoeBDortoka vremiri: A new species of Dortokid Turtle from the Late Cretaceous of the Hațeg Basin, Romania.
Posted by JoeBThe Cabeço da Amoreira burial: An Early Modern Era West African buried in a Mesolithic shell midden in Portugal.
Posted by JoeBMusivavis amabilis: A new species of Enantiornithine Bird from the Early Cretaceous Jehol Biota of northeastern China.
Posted by JoeBTorosaurus in Canada.
Posted by JoeBStone tools from the Borselan Rock Shelter, in the Binalud Mountains of northeastern Iran.
Posted by JoeBDating the Lantian Biota.
Posted by JoeBBashanosaurus primitivus: A new species of Stegosaur from the Middle Jurassic of Chongqing Municipality, China.
Posted by JoeBDetermining the time of year when the Chicxulub Impactor fell.
Posted by JoeBSão Tomé and Príncipe: Possibly the last country on Earth never to have been visited by a working archaeologist.
Posted by JoeBMambawakale ruhuhu: A new species of Pseudosuchian Archosaur from the Middle Triassic Manda Beds of Tanzania.