Monumental vertical geological cutaway cross-section of the Earth's crust on clean white background: tiny simplified skyscraper silhouettes on the surface establishing scale, with a massive vertical industrial mine shaft plunging 2.5 miles deep into dark dense bedrock layers with horizontal extraction tunnels branching at the bottom, clean negative space on left and right for depth markers, hand-drawn 2D explainer cartoon illustration, thick clean black outlines, simplified readable forms, flat cel-style colors, soft minimal shading, clean educational YouTube illustration, clear focal hierarchy, no photorealism, no 3D rendering, no typography, no text, no watermarks
