Dinosaur tracks preserved instantly?

Were dinosaur tracks and other ancient animal footprints preserved nearly instantly during catastrophic events?

The fact that dinosaur tracks have been fossilized in mud, volcanic ash and limestone would suggest that something has transformed the soft material into a harder material and fairly quickly.

The prime example is in China where over 3000 footprints of dinosaurs were found, all running the same way even though they were very different species. Running from what that scared all of them? Running from an event that converted the material into something harder, so we could discover their tracks.

fossilised dinosaur tracks footprintsScientists in China say they have discovered more than 3,000 dinosaur footprints, all facing the same way. The footprints – thought to belong to at least six dinosaur types

The footprints were uncovered on a 2,600 sq m (0.64 acre) rock slope in a gully following three months of excavation work, Xinhua reported.The find is unusual because of the quantity and size of footprints uncovered, scientists said. The footprints, which range from 10cm (3.9in) to 80cm in length, belong to dinosaur types including tyrannosaurs, coelurosaurs and hadrosaurs, Xinhua said.
China dinosaur footprints found in Zhucheng | BBC

New Zealand dinosaur tracks preserved in sand over large area

New Zealand’s fossilised dinosaur tracks are found in 6 locations over a 10 kilometre area.

Not just a very local preservation episode but a much larger area rapidly fossilized and chemical elements transmuted?

dinosaur tracks foot prints preservedScientists have discovered the first evidence that dinosaurs roamed the South Island of New Zealand with 70-million-year-old footprints found in six locations …
The footprints were found by scientist Greg Browne in the remote Whanganui Inlet in the northwest of Nelson at the top of the South Island …
The footprints were made in beach sands and were probably quickly covered and preserved by mud from subsequent tides. “What makes this discovery special is the unique preservation of the footprints in an environment where they could easily have been destroyed by waves, tides, or wind,” Browne said.
Dinosaur prints found on New Zealand’s South Island | Phys.org