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There are still, however, conflicting opinions regarding the age of the Yuanmou Fm. Older research by Liu and Ding (1984) noted that the faunal sequence at the site was inverted, with more extinct species in the upper levels than deeper in the deposit, and based on this evidence they suggest to put the age of the Yuanmou man into the Middle Pleistocene, that is about 0.5 - 0.6 Ma BP.

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Such a preserved specimen is called a "fossil" if it is older than some minimum age, most often the arbitrary date of 10,000 years.

The observation that certain fossils were associated with certain rock strata led early geologists to recognize a geological timescale in the 19th century.

The development of radiometric dating techniques in the early 20th century allowed geologists to determine the numerical or "absolute" age of the various strata and thereby the included fossils.

Go to The Far North Queensland Fossil Heritage Expedition page for details of the photos shown below: Ichthyosaur 960901 discovered 1996 - paddle detail Our Ichthyosaur on display at Kronosaurus Korner, Queensland Museum Read a reconstruction of the last days of this Ichthyosaur - a pregnant female Ichthyosaur 970602 discovered 1997 The fate of Ichthyosaur 970602 Giant Squid discovered 1998 Giant Bullock Size Marsupial - new species 1999 Tusk from another giant marsupial Trace Fossils Global Temperature Change through Geological Time How to tell the two major dinosaur groups apart Allosaurus Ankylosaurus Apatosaurus Camptosaurus Centrosaurus Compsognathus Ichthyosaur Ichthyosaur2 Nodosaurus Pachysephalosaurus Plateosaurus Stegosaurus Triceratops Tyranosaurus Tyranosaurus front view Tyranosaurus skull photo Dinosaur Track Looking for Fossils in a drainage system Trilobite Conodont Index Fossils Chart Microfossils All you wanted to know about Ichthyosaurs a mirror with thanks of some of the content of Ryosuke Motani's excellent web resources on Ichthyosaurs(external link) Extinctions through time chart Geolgical time scale with events (simple) Geologic Time Carbon 14 Dating Calculator (interactive javascript) Radiocarbon (14C) Dating Absolute Dating and Geologic Time Scale The Age of the Earth Dendrochronology -dating using tree rings Geological Time as a glass of beer Famous Extinctions through time - graphical form Events through geological time Simple Geological time chart Oxygen content of Atmosphere through time graph(44k) The crater that caused the Permian Extinction?

Radioactive Isotopes - the "Clocks in Rocks" strontium-rubidium isotope image parent-daughter graph Parent-daughter cartoon Determining Argon gas concentration Australia's own living fossil the Wollemi Pine The Principle of superposition Formation of Gondwana Written by young enthusiasts - minimal editing by webmaster Fossil Footprints How to find fossils then What to do with them Describing the Environment and Creatures of the Different time periods Careers in Palaeontology Sequence of Cratering on Venus using false colour image processing click on thumbnail for full size image black and white order of cratering not evident false colour indicates more than one cratering event sequence of cratering is clear This sample done using freeware ...

LView19pro Step by step instructions see our satellite image processing course ... using false colour imagery to interpret the use of aboriginal stone tools The Sun A Brief Overview of the Solar System Kepler's Laws of Planetary Motion Meteorites Minerals in Meteorites Identifying Meteorites Meteorite Cratering on Earth Tektites - Australia's unusual meteorite The Tunguska Event - eyewitness reports translated into English Meteorites and Mass Extinctions Queensland's Giant Meteorite Crater?

Later, stone artifacts, pieces of animal bone showing signs of human work and ash from campfires were also dug up from the site.

The fossils are on display at the National Museum of China, Beijing.

The remnants of Yuanmou Man were discovered on May 1, 1965, by the geologist Fang Qian, who was working for the Geological Mechanics Research Institute. (1983) believed the age of Yuanmou Man was Middle Pleistocene, did not exceed 0.73 Ma BP, and was probably contemporaneous with Peking Man.

Based on the palaeomagnetic dating of the rock they were found in, it was initially estimated that the fossils were about 1.7 Ma BP and thus represented the earliest fossils of human ancestors found in China and East Asia. Subsequently, Qian (1985) conducted further studies of the age of Yuanmou Man, but still obtained an age of 1.7 Ma BP, or Early Pleistocene.

(this skepticism has since lifted, with additional findings in the last 25 years). (1978) suggested that Member 4 in the upper part of the formation is middle Pleistocene and should be designated the Shangnabang Fm., while the sediments exposed at Shagou containing Enhydriodon cf. These investigations initiated beneficial discussion, although further conflicting opinions persist regarding depositional environment, paleoclimatology, glaciation, and other aspects. (1991), palaeomagnetic dates from near where the teeth were recovered average 1.7 Ma BP.

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