Sedimentology and tectonic significance of the Nutzotin ...

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Transcript of Sedimentology and tectonic significance of the Nutzotin ...

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Figure 2-2: Small fold adjacent to fault zone, Bonanza Creek.

Figure 2-3: Fault at low angle to bedding, Middle Division, Bonanza Creek.

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Figure 2-6: Folded package of turbidites within the conglomerate of the Lower Division, Bonanza Creek.

Figure 2-7: Muddy matrix conglomerate, Lower Division, Bonanza Creek.

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Figure 2-8: Small block of siltstone and mudstone within turbidites adjacent to the conglomerate of the Lower Division, Bonanza Creek.

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Figure 2-10: Thick sandy turbidite beds, Lower Division, Bonanza Creek.

Figure 2-11: Typical appearance of the Lower Division turbidites, Bonanza Creek.

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Figure 2-12: Convolute laminae in turbidite bed, Lower Division, Bonanza Creek.

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Figure 2-14: Layer of slumped bedding, Lower Division, Bonanza Creek.

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Figure 2-15: Disrupted, folded beds in muddy matrix, Lower Division, Bonanza Creek.

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Figure 2-16: Slump fold, Lower Division, Bonanza Creek.

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Figure 2-18: Typical graded and parallel-laminated sandstone bed from the Middle Division, Bonanza Creek.

Figure 2-19: Massive mudstone beds alternating with much thinner sandstone beds, Upper Division A, Bonanza Creek. Cross-cutting feature is an andesite dike.

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Figure 2-21: Upper Division B, Bonanza Creek.

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Figure 2-23: Thrust fault (?), Two-by-Four Creek. (Note person for scale).

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Figure 2-24: Soft-sediment deformation features (at tip of hammer), Camp Creek, Lower Sheep Creek.

Figure 2-25: Flaser and lenticular bedding, Two-by-Four Creek.

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Figure 2-26: Parallel- and cross-laminated siltstone within mudstone bed, Upper Sheep Creek.

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Figure 2-27: Thick, parallel-laminated sandstone bed, Upper Sheep Creek.

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Figure 3-3: Typical sandstone from the Bonanza Creek suite. Note poor sorting and angularity. (25x, Plane light).

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Figure 3-4: Prehnite in sandstone sample, Upper Sheep Creek (40x).

Figure 3-5: Recrystallized, faintly foliated quartz grain, Bonanza Creek suite. (25x).

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Figure 3-6: Polycrystalline quartz clasts, Bonanza Creek suite. (100x).

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Figure 3-7: Euhedral monocrystalline quartz with resorption cavity, Bonanza Creek suite. (100x).

Figure 3-8: Euhedral, zoned plagioclase grain, Bonanza Creek suite. (100x).

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Figure 3-9: Alkali feldspar (left), Bonanza Creek suite. (40x).

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Figure 3-10: Typical appearance of volcanic clasts, Bonanza Creek suite. (40x).

Figure 3-11: Mafic/intermediate volcanic clast with porphyritic texture, Bonanza Creek suite. (40x).

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Figure 3-12: Mafic/intermediate volcanic clast with trachytic texture, Bonanza Creek suite. (40x).

Figure 3-13: Silicic volcanic clast, Bonanza Creek suite. (40x).

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Figure 3-14: Coarse grained silicic igneous clast, Bonanza Creek suite. (40x).

Figure 3-15: Sedimentary clasts, Bonanza Creek suite. (25x).

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Figure 3-16: Sedimentary clast, Bonanza Creek Division. (25x).

Figure 3-17: Foliated metamorphic clast, Bonanza Creek suite. (40x).

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Figure 3-20: Feldspathic sandstone from Upper Division, Bonanza Creek. (25x).

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