[1] The Phu Kradung Formation sediments were deposited in a lake-dominated floodplain cut by meandering and occasionally braided river channels.

[2] The Phu Kradung Formation is considered, on the basis of recent vertebrae fossil discoveries, to be Late Jurassic in age.

However, new palynology and biostratigraphic data suggests an age of Early Cretaceous for the upper section.

[5][6] Chalawan, an extinct genus of pholidosaurid mesoeucrocodylian, is currently known solely from its holotype, a nearly complete mandible collected in the early 1980s from a road-cut near the town of Nong Bua Lamphu in the upper part of the Phu Kradung Formation.

[7] Multiple fin spines have been found in the Phu Kradung Formation which cannot be precisely identified.