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The Connecticut River Valley trackways are the fossilised footprints of a number of Early Jurassic dinosaurs or other archosauromorphs from the sandstone beds of Massachusetts and Connecticut. The finding has the distinction of being among the first known discoveries of dinosaur remains in North America.
The largest and most plentiful footprints bear the name Eubrontes, an ichnogenus (fossilized footprint type) named by geologist Edward Hitchcock. They were probably created by a carnivorous theropod dinosaur similar to Dilophosaurus. The Eubrontes tracks range from 10 to 16 inches (410 mm) in length and are spaced 3.5 to 4.5 feet (1.4 m) apart ...
Dinosaur Provincial Park is a UNESCO World Heritage Site situated 220 kilometres (137 mi) east of Calgary, Alberta, Canada; or 48 kilometres (30 mi) northeast of Brooks.. The park is situated in the Red Deer River valley, which is noted for its striking badland topography, and abundance of dinosaur fossils.
One of the footprints at the Dinosaur Footprints Reservation. As the name implies, fossil footprints are this park's main attraction. They were formed during the Early Jurassic period (approximately 200 million years ago) when what is now the Connecticut River Valley was a subtropical region filled with lakes and swamps.
Martin Lockley & Adrian P. Hunt, Dinosaur Tracks and Other Fossil Footprints of the Western United States, Columbia U. Press, New York (1995). J. S. Nagle, Glen Rose Cycles and Facies, Paluxy River Valley, Somervell County, Texas. Texas Bureau of Economic Geology Geological Circular No. 68-1. 25 pp. (1968). J. S. Nagle, Stepping Stair Hills.
In the United States, dinosaur footprints and trackways are found in the Glen Rose Formation, the most famous of these being the Paluxy River site in Dinosaur Valley State Park. These were the first sauropoda footprints scientifically documented, and were designated a US National Natural Landmark in 1969. Some are as large as about 3 feet across.
The Post Track, a prehistoric causeway in the valley of the River Brue in the Somerset Levels, England, is one of the oldest known constructed trackways and dates from around 3800 BCE. The world's oldest known paved road was constructed in Egypt some time between 2600 and 2200 BC.
Eubrontes is the name of the footprints, identified by their shape, and not of the genus or genera that made them, which is as yet unknown but is presumed to be similar to Coelophysis or Dilophosaurus. They are most famous for their discovery in the Connecticut River Valley of Massachusetts in the early 19th century. They, among other ...