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Fig. 3 | Geochemical Transactions

Fig. 3

From: A geochemical view into continental palaeotemperatures of the end-Permian using oxygen and hydrogen isotope composition of secondary silica in chert rubble breccia: Kaibab Formation, Grand Canyon (USA)

Fig. 3

Example of translucent to white secondary silica from the Kaibab Formation chert rubble breccia (Sevenmile Draw). Vugs are typically rimmed with fibrous silica which transition to drusy quartz toward the middle of vugs, interstices or cavities. Mechanical pencil tip (width) is 0.05 mm

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