Stratigraphic unit search form

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Group, formation, or member:
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Hints: none of the fields are required, and you can search by filling out any combination of one or more fields. The search engine is not case sensitive and wildcards are allowed. You can use "_" to match any single character or "%" for an open ended match. You may enter ranges and comma separated variables for collection numbers, i.e. 300, 400-405
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