Cambrian trilobites of east-central Alaska

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fPlates 1-15 follow index; plate 16 is in pocket] PLATE 1, 2. Early Cambrian-1 fauna. 3. Early Cambrian-2 fauna. 4. Early Cambrian-3 fauna; Middle Cambrian-1 fauna. 5. Middle Cambian-1 fauna. 6. Middle Cambrian-1, -2 fauna; Dresbachian-1 fauna. 7-9. Dresbachian-2 fauna. 10. Dresbachian-2 fauna; Franconian-1 fauna. 11-13. Franconian-2 fauna. 14. Franconian-2 fauna; Trempealeauan-1 fauna. 15. Trempealeauan-1, -2 fauna. 16. Stratigraphic occurrences of trilobites in measure*, sections, east-central Alaska and immediately adjacent Canada. FIGURE 1. Index map showing outcrop areas of Cambrian rocks in eastern Alaska and immediately adjacent parts of Cana da ___--______--_____-____

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