Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Vesicular Structure

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_2664
The gas in a volcanic lava flow will diffuse upwards while flowing and leave holes in the lava after cooling; this is called a vesicular structure. Its shape can be round, elliptical, cloud-shaped, or tube-shaped. The shape of the hole and the array orientation usually indicates the lava flow direction. Vesicular structures are common in China’s geoparks that are composed of basalt (Fig. 4).
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