Search
Search
USGS Thesaurus
Search
Categories
>
topics
>
earth characteristics
>
stratigraphic sections
geologic contacts
Junctions of two different rock formations varying by type or age of rock, including faults, unconformities, and bedding planes.
This category is also used for
contacts (geologic)
Subtopics
unconformities
See also
geologic maps
stratigraphy
JSON
XML