What are cracks and fractures? How does hydraulic fracturing work? How does HF relate to sheeted clastic dikes? In this post, I reveal the process of drafting figures for future publication that explain fluid-driven fractures and crack propagation relevant to sheeted clastic dikes in the Columbia Basin, USA. These concepts (fracture mechanics)are common to engineers and petroleum geologists, but foreign to most geology majors and their professors. These concepts are not taugh