Synonyms
Exposure mapping; Trench logging; Trench mapping
Definition
The making of a geological map of vertical (or near-vertical) face(s), whether natural or man-made.
The U.S. Bureau of Reclamation (USBR 1998) describes standards for the following types of exposure logging: Dozer [bulldozer] Trench Mapping, Backhoe Trench Mapping, Large Excavation Mapping, and Steep Slope Mapping (Fig. 1).
Multibench trench excavated during an active fault study, USA. Each vertical wall is ~1.2 m high and horizontal benches are the same width. Walls have been cleaned enough to differentiate the major deposits. All spoil from wall cleaning was removed from bench surfaces so contacts can be traced across benches, allowing 3D mapping
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McCalpin, J.P. (2018). Exposure Logging. In: Bobrowsky, P.T., Marker, B. (eds) Encyclopedia of Engineering Geology. Encyclopedia of Earth Sciences Series. Springer, Cham. https://doi.org/10.1007/978-3-319-73568-9_193
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DOI: https://doi.org/10.1007/978-3-319-73568-9_193
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