http://breezewiki.bunny5exbgbp4sqe2h2rfq2brgrx3dhohdweonepzwfgumfyygb35wyd.onion/minecraft/wiki/Gravel
In the nether , gravel generates naturally in layers along the shores of the lava sea , in all biomes except crimson and warped forests . The layers are one block deep in nether wastes , and 3-5 blocks deep in soul sand valley and basalt deltas . Ore features of gravel in the nether attempt to replace netherrack 2 times per chunk in blobs of size 0-160, from levels 5 to 41 [ JE only ] or 36 [ BE only ] , in all Nether biomes except basalt deltas .