- published: 03 Nov 2015
- views: 165
The Mazon Creek fossil beds are a conservation lagerstätte found near Morris, in Grundy County, Illinois. The fossil beds are located in ironstone concretions, formed approximately 300 million years ago in the mid-Pennsylvanian epoch of the Carboniferous period. These concretions frequently preserve both hard and soft tissues of animal and plant materials, as well as many soft-bodied organisms that do not normally fossilize. The quality, quantity and diversity of fossils in the area, known since the mid-nineteenth century, make the Mazon Creek lagerstätte important to paleontologists, in attempting to reconstruct the paleoecology of the sites. The locality was declared a National Historic Landmark in 1997.
The Mazon Creek fossils are found in the Upper Carboniferous Francis Creek Shale; the type locality is the Mazon River (or Mazon Creek), a tributary of the Illinois River near Morris, Grundy County, Illinois. The 25 to 30 meters of shale were formed approximately 300 million years ago, during the Pennsylvanian period. The fossiliferous concretions are usually found within the thickest deposits of Francis Creek. The concretions occur in localized deposits within the silty to sandy mudstones, in the lower four metres of the formation. The paleoecosystem is believed to be a large river delta system, deposited by at least one major river system flowing from the northeast. The sediments are believed to derive from the Appalachian orogeny events. The delta had a tropical climate, a result of the area being within 10° north latitude of the equator during the Pennsylvanian.
Mason Creek Bluegrass Band - Flint Hill Special
Mason Creek - Struttin to Ferrum
Mason Creek Bluegrass Band - Gonna Settle Down
Mason Creek [USA] - Songs For A Rainy Afternoon, 1970) (b_4. Sonday Morning -- Rainy Afternoon).
News Flash: Mason Creek Elementary is Hard at Work on Their Gravity Games Car
Mason Creek Bluegrass Band - Little Girl of Mine in Tennesee
Mason Creek Elementary Christmas Concert 2012
Mason Creek Elementary Christmas Concert 2012
Mossy Oak Mason Creek leather sling ZRUS
Station at Mason Creek Apartments - Katy Apartments For Rent
Mason Creek & Buffalo Bayou within Barker Reservoir natural
Mason Creek Office Center
Yeager vs Mason Creek .
Kayaking Mason Creek, Salem Virginia, 03/03/2012 part 13