Scriven Rock is a location mentioned in the game, Dreamworks Dragons: Dawn of New Riders.
Nothing is mentioned about the geology, landscape, flora, or fauna of Scriven Rock. It is a populated island, as Scribbler lived and learned here. The residents also know about the existence of dragons, so there might be some living on the island.
Scriven Rock is mentioned in this game as the homeland of the main character, Scribbler. It is revealed that "G", a dragon poacher who stole Eir Stormheart's Chimeragon experiment, sought out an 'island of scrolls' to see what the populace knew of dragons to remedy the Chimeragon's rapid aging.