Vesicular Basalt Rock with Xenoliths - Geological Illustration #141797 (License: Personal Use)

This finely detailed woodcut-style engraving depicts a sample of vesicular basalt, characterized by numerous gas-filled cavities (vesicles) and darker, irregularly shaped inclusions known as xenoliths-fragments of older rock entrained during magma ascent. The cross-hatched shading emphasizes surface topography and internal structure, typical of geological reference illustrations from the late 1800s. Such images were used to teach petrology before modern photomicrography became widespread.

Used in educational geology webpages, museum digital archives, or academic resources explaining igneous rock formation; targets students, educators, and amateur geologists seeking visual references for volcanic textures and xenolith identification.