Flat Rock at the Museum of Contemporary Art, North Miami, is Virginia Overton’s first solo exhibition in an American museum. The new freestanding sculptures that Overton created for the show are tenuous yet forceful assemblages of materials the artist encountered around Miami and on site at the museum. The exhibition begins with a large-scale fountain that Overton created for the museum’s pond. In the gallery, she addressed the existing architecture by arranging long planks of lumber to create two parallel lean-to walls; this rudimentary architectural device carves out a long passageway that viewers must navigate before entering a diagonally warped exhibition space.