ash field
   A land area covered by a relatively thick or distinctive, surficial deposit of volcanic ash (air fall) that can be traced to a specific source and has well defined boundaries. An ash field can be distinguished from adjacent landforms or land areas based on ash thickness, mineral composition, and physical characteristics. Soils within an ash field form solely or predominantly within the ash deposit. SW & GG

Glossary of landform and geologic terms. 2013.

Look at other dictionaries:

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  • ash plain — noun : ash field …   Useful english dictionary

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