The Forest Marble is a geological formation in England.

Part of the Great Oolite Group, it dates to the late Bathonian stage of the Middle Jurassic.

[1] The primary lithology of the formation typically consists of greenish grey variably calcareous silicate mudstone, with lenticular cross bedded limestone units deposited in a marine setting.

[3] Another important locality is Watton Cliff near Eype in Dorset.

"[13] Reassigned to Marmarospondylus Indeterminate[8] Cardiodon[10] C. rugulosus[10] Cetiosaurus[14] C. oxoniensis A cetiosaurid sauropod.