Gravity? What gravity? These stones, gathered from the Pacific Ocean in Mexico, seem completely oblivious to any rules of weight and mass. California artist Woods Davy’s new sculpture series, “Cantamar,” features a variety of rocks in gravity-defying formations. The stones appear to float, creating an impression that is at once eminently peaceful and profoundly unsettling. Why do they stay up there? This apparent contradiction is emblematic of Davy’s work. All the elements are natural, yet they behave in ways that are completely unnatural. He calls his sensibility “Western zen.” Like the discipline, the stones raise questions that have only mysterious answers.