5 results on '"Twelker, Evan"'
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2. U-PB DETRITAL ZIRCON GEOCHRONOLOGY OF CRETACEOUS-CENOZOIC SEDIMENTAY ROCKS IN THE LADUE RIVER MOUNT FAIRPLAY AREA, ALASKA.
3. EXPLANATION OF MAP UNITS: NORTHEASTERN TANACROSS GEOLOGIC MAP, TANACROSS D-1, D-2, C-1, AND C-2 QUADRANGLES, ALASKA.
4. PRELIMINARY REPORT ON MINERAL OCCURRENCES IN THE TOK RIVER AREA, ALASKA.
5. EXPLANATION OF MAP UNITS: Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska (1:50,000 scale).
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