Not prolonged right after Europeans first 'crossed the Blue Mountains', Charles Darwin stood at Govetts Leap. He imagined the puny stream below could not account for that prodigious valley, and surmised which the sea have to have inundated the land and fashioned the gorges by coastal erosion. Rock & Mineral https://sandstoneblocksorange41616.shoutmyblog.com/14615111/natural-stone-building-and-landscape-materials-nsw-central-west-an-overview