1. A method of forming a memory array, comprising: forming first electrode material over a base; forming a memory cell stack over the first electrode material; the memory cell stack including, in ascending order from the first electrode material, a first insulator material, at least one additional insulator material, an electrically conductive material, and memory element material; patterning the first electrode material and the memory cell stack into a first set of spaced lines extending primarily along a first horizontal direction; forming dielectric material between the spaced lines of the first set; forming spaced lines of second electrode material over the first set of spaced lines and over the dielectric material, the lines of second electrode material being a second set of spaced lines and extending primarily along a second horizontal direction that is orthogonal to the first horizontal direction; and removing memory element material and electrically conductive material of the memory cell stack from regions between the lines of the second set to leave an array of memory unit cells, individual memory unit cells comprising the memory cell stack between the first electrode material and the second electrode material.