not much
These six bucks come by from time to time. I’ve dug through an awful lot of caliche since I bought this Tinderbox acre in 2017. Caliche is a sedimentary rock, a hardened natural cement of calcium carbonate that binds other materials. It generally is found on or near the surface and layers vary from a few inches to feet thick. The depth of the caliche layer is sensitive to average annual rainfall. Caliche forms where annual precipitation is less than 26” per year and the mean annual temperature exceeds 41 °F. One can look into why this is so, as well as, how plant roots, carbon dioxide, calcium carbonate, bicarbonate come into play. Eventually a mixture of calcium carbonate and clay particles accumulates, first forming grains, then small clumps, then a discernible layer, and finally, a thicker solid bed. But I would guess you would rather do just about anything else. I used a pick to dig through this layer and a couple more. Through trial and errors, many errors, I learned to