Geobulletin alpha

Source info:

Author:	Edie
Date:	2014-02-14 17:36:00
Blog:	Geology in the West Country
URL:	http://geologywestcountry.blogspot.com/2014/02/850000-year-old-footprints-found-in.html

Summary:

The oldest human footprints ever found outside Africa, dated at between 850,000 and 950,000 years old, have been discovered on the storm-lashed beach at Happisburgh in Norfolk, one of the fastest eroding stretches of the British coast. Within a fortnight the sea tides that exposed the prints last May destroyed them, leaving only casts and 3D images made through photogrammetry – by stitching together hundreds of photographs – as evidence that a little group from a long-extinct early human species had passed that way.They walked through a startlingly different landscape from today’s, along the estuary of what may have been the original course of the Thames, through a river valley grazed by mammoths, hippos and rhinoceros. The pattern of the prints suggests at least five individuals heading southward, pausing and pottering about to gather plants or shellfish along the bank. They included several children. The best preserved prints, clearly showing heel, arch and four toes – one may not have left a clear impression – is of a man with a foot equivalent to a modern size 8 shoe, suggesting an individual about 5ft 7ins (1.7 metres ) tall.Although far older footprints have been found in Africa, the prints are more than twice the age of the previous oldest in Europe, from southern Italy and dated to around 345,000 years.The Norfolk footprints are the first direct evidence of people at the most northerly edge of habitation in Europe, otherwise known only from fossilised animal bones and flint implements from a site nearby. The scientists worked flat out in the few hours between tides, sponging away seawater and brushing off sand, to record the prints. They were dated from the overlying sedimentary layers and glacial deposits, and the fossil remains of extinct animals – identified by Simon Parfitt, of the Natural History Museum, as including mammoth, an extinct type of horse and an early form of vole. The climate was close to that of modern Scandinavia, with warm summers and very cold winters, when the group walked across the wet mud. With the river, plain and brackish pools there was abundant food including prey animals, shellfish and edible plants. However, very soon in geological terms, perhaps within 50,000 years, the weather got much worse and the humans retreated back across the landbridge to the continent and further south.Prof. Chris Stringer says confirmation will have to wait for fossil finds, but he believes the Norfolk hominids were related to people from Atapuerca in Spain described as Homo antecessor, pioneer man. He believes they became extinct in Europe, perhaps replaced by another early human species, Homo heidelbergensis, then by Neanderthals from around 400,000 years ago and finally by modern humans. Life was not always a stroll across a beach: the Spanish human fossils show the same cut marks as the animal bones, evidence of cannibalism.

Content analysis:

Geographic context:

Location	Country	Latitude	Longitude
Africa		2.07079	15.8005
Atapuerca	ES	42.3768	-3.50786
Europe		52.9762	7.85784
Happisburgh	GB	52.8244	1.53101
Italy	IT	42.5038	12.5735
Natural History Museum	GB	51.4956	-0.17531
Norfolk	GB	52.674	0.95091
River Valley	US	48.0203	-95.7907
Scandinavia		61.0102	13.2445
Spain	ES	39.8949	-2.98831

Keywords:

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