“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Laurel in Prince George's County, Maryland — The American Northeast (Mid-Atlantic)

Dinosaur Alley

Dinosaur Alley Marker image. Click for full size.
By Allen C. Browne, July 28, 2013
1. Dinosaur Alley Marker
Inscription. Dinosaurs lived during most of the Mesozoic Era (235 to 65 million years ago), on every continent on Earth. In Maryland, each of three Mesozoic time periods in which dinosaurs live is represented in its geology -- Triassic, Jurassic, and Cretaceous. Therefore, it is not surprising that Maryland has produced more dinosaur bones than almost any other state east of the Mississippi River.

Dinosaur Alley

Maryland's "Dinosaur Trail" occupies the geologic region that runs parallel to the Route 1 corridor between Washington and Baltimore. The rock layers in this area are about 100 million years old and fall in the Early Cretaceous Period (144 to 65 million years ago). They contain one of the largest concentrations of dinosaur fossils on the East Coast. Thousands of fossils have been found in the gray and red clays near Laurel, Maryland.

Many different dinosaur fossils have been found in a section of the Dinosaur Trail called "Dinosaur Alley," including predators resembling Acroncanthosaurus, small Deinonychus-like meat eaters, the armored dinosaurs, Princonodon, duck bill-like Tentontosaur, and the Maryland State dinosaur, Astrondon johnstoni, a sauropod.

One hundred million years ago, this area was a broad, flat delta with slow, curving rivers. Remains of
Dinosaur Alley Marker image. Click for full size.
By Allen C. Browne, July 28, 2013
2. Dinosaur Alley Marker
dinosaurs, plants and other animals were washed by floodwaters into oxbow lakes that formed at sharp bends in the rivers. There, the remains became trapped, were covered with sediment, and slowly fossilized. The Fossils here in the "Muirkirk Deposit" area are from these ancient oxbow lakes.
Location. 39° 4.248′ N, 76° 52.123′ W. Marker is in Laurel, Maryland, in Prince George's County. Marker can be reached from Mid Atlantic Blvd.. Click for map. The marker is in Dinosaur Park. Marker is at or near this postal address: 13201 Mid Atlantic Boulevard, Laurel MD 20708, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Welcome to Dinosaur Park (here, next to this marker); Dinosaurs in Maryland! (here, next to this marker); Dinosaur Park's Industrial Heritage (a few steps from this marker); Three Sisters: Close Knit Communities of the Laurel Area. (approx. 0.8 miles away); Abraham Hall: A Historic African American Benevolent Lodge (approx. 0.8 miles away); Iron Production: Maryland's Industrial Past - The Iron Making Process (approx. 0.8 miles away); When the Iron was Hot: African America Ironworkers of Muirkirk (approx. 0.8 miles away); Queen’s Chapel Methodist Church, Established 1868 (approx. 0.9 miles away). Click for a list of all markers in Laurel.
Also see . . .
Dinosaur Alley Map image. Click for full size.
By Allen C. Browne, July 28, 2013
3. Dinosaur Alley Map
Map showing a swath of Mesozoic age rocks traversing Maryland from the northeast corner of the state in Cecil County through Baltimore and Washington and on south toward Fredericksburg Virginia.
Close-up of map on marker
 Laurel area rich in dinosaur fossils is dedicated as a park. by Jonathan Mummolo, The Washington Post, Tuesday, October 27, 2009. (Submitted on July 30, 2013, by Allen C. Browne of Silver Spring, Maryland.) 
Categories. Paleontology
Dinosaur Park image. Click for full size.
By Allen C. Browne, July 28, 2013
4. Dinosaur Park
A sign at Contee Road and Mid-Atlantic Boulevard illusrates Maryland's State Dinosaur, Astrondon johnstoni.
Credits. This page originally submitted on , by Allen C. Browne of Silver Spring, Maryland. This page has been viewed 411 times since then and 67 times this year. Photos:   1, 2, 3, 4. submitted on , by Allen C. Browne of Silver Spring, Maryland. • Bill Pfingsten was the editor who published this page. This page was last revised on June 16, 2016.
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