This microscopic image shows a cleaned off portion of the rock dubbed Adirondack. In preparation for grinding into the rock, Spirit wiped off a fine coat of dust with a stainless steel brush located on its rock abrasion tool. Some of this dust coating can be seen to the left of the image. Scientists plan to analyze the newly-exposed patch of rock with the rover's suite of science instruments, both before and after the top layer is removed. The image was taken by the rover's microscopic imager. The observed area is 3 centimeters (1.2 inches) across.