File:First known animal tracks on land (24279487891).jpg

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This is super crazy_ the earliest known tracks of life on land ~515 million years ago in the Cambrian era. Look closely at this busy slab to see quite a number of trackways from two kinds of trace fossils. Models of the animals are above the slab.

Found in 1983 in a quarry north of Kingston Ontario, were two (!!) types of hand-sized to foot-long creatures crawling around in numbers and visible on wet parts of windblown beach sand. Left is Climatichnites, the trackway left by a large sluglike animal and right is Protichnites, the trace fossil for a 16-legged arthropod. Makes you wonder what these critters were grazing on.

And these are large, well-developed and highly-evolved animals with chronological room for even earlier creatures perambulating ashore.

Redpath Museum, McGill University, Montréal, Quebec, Canada. Museum is geotagged.

Allow me to promote the latest global geocience offering, a very, very, very informative, well-written and photogenic coffee-table book published by Nimbus. Four Billion Years and Counting, Canada's Geological History (which has a bit of the back story for this find)

A second interesting trace fossil read is _ Dinosaurs Without Bones, Dinosaur Lives Revealed by their Trace Fossils _ by Anthony J. Martin (2014)

Date
Source First known animal tracks on land
Author Mike Beauregard from Nunavut, Canada
Camera location45° 30′ 16.31″ N, 73° 34′ 39.27″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMap - Google Earthinfo

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Checked copyright icon.svg This image was originally posted to Flickr by subarcticmike at https://flickr.com/photos/31856336@N03/24279487891. It was reviewed on by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

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