Hornfels Specimen, Hornfels forms in narrow band between an igneous intrusion and surrounding rock., Each

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Here is the corrected text: • Hornfels sample, approximately 1" (3cm) in size • Formed at the baked contact between an intruding igneous body and the surrounding rock • Perfect size for use in classroom identification labs and exercises, correlating well with Next Generation Science Standards Evidence Statements • Great for students studying the effects of thermal alteration on metamorphic rocks • The specimen comes in a clear, labeled, and barcoded bag for ideal storage • Average specimen size: 2-3 cm Hornfels forms in the narrow band between an igneous intrusion and the surrounding rock. As an intrusion propagates through the crust, the magma scorches and heats the surrounding crustal rock, chemically altering it to form a baked contact containing hornfels. This sample is ideal for metamorphic rock classification and identification, serving as a great example of heat alteration.