Arasine

I just wanted to ask the community if this is normal. After playing many tens of hours in a 1.19 pre version, I have only seen three types of stone. Granite, Andesite and Basalt. I have ran for in game days in all directions, swam across oceans, dug to the centre of the Earth, climbed mountains but the entire world is made of Granite, Andesite and Basalt.. This is obviously stymying gameplay, as I cant progress several lines of gameplay (the traders are no help either but thats another topic!). Am I just very unlucky? Has anything changed in 1.19 ? In my other 3 worlds, within a day or so running in a fixed direction I always reached other stone types / general different terrain. But in this 1.19 world everything is almost the same in every direction seemingly forever. This and the general terrain generation are my only complaints with this fantastic game Thanks for any insight!