This is a vintage watercolor and ink drawing of a geological formation, likely a rock sample. The rock is depicted in a vertical, rectangular shape, showcasing distinct layers. These layers are characterized by alternating stripes of black, white, and gray, creating a banded appearance. The texture is conveyed through fine lines and shading, suggesting the rock's composition and structure. The drawing is on a cream-colored paper, and at the bottom, there's text indicating the publication date (Dec. 1 1802) and publisher (Ja. Sowerby, London). The overall style is reminiscent of scientific illustrations from the early 19th century.