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Table 1 Description, data and location of fifteen Kaibab Formation secondary (authigenic) silica samples extracted from the end-Permian chert rubble breccia (northern Arizona)

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)

δ18O SMOW (‰)a δD SMOW (‰)a Description and location of secondary silica samples
30.8 − 74.5 Drusy, vug-fill silica (Marble Canyon; KNB1)
30.6 − 70.0 Drusy, vug-fill silica (Soap Creek; SC2)
29.7 − 87.8 Translucent, microcystalline silica vug-fill (Badger Canyon; BC1)
30.8 − 77.6 Translucent drusy, vug-fill quartz (Marble Canyon; MC22)
29.9 − 76.1 White, translucent granular microcrystalline silica (Badger Canyon; KF1)
30.6 − 73.6 Translucent granular microcrystalline silica (Marble Canyon; K6)
30.99 − 78.0 White, translucent granular microcrystalline silica (Badger Canyon; KF2)
31.01 − 75.7 Translucent, dull botryoidal silica (Sevenmile Draw; K7)
28.52 − 86.2 Translucent, granular microcrystalline silica (Sevenmile Draw; K5)
31.5 − 77.0 White, translucent granular microcrystalline silica (Marble Canyon; NB1)
30.9 − 68.9 Translucent, granular microcrystalline silica (Soap Creek Canyon; SC3)
30.46 − 80.8 Translucent, dull botryoidal silica (Sevenmile Draw; 744)
28.9 − 82.0 White, translucent granular microcrystalline silica (Marble Canyon; NBK)
27.7 − 92.0 White, pale blue fibrous silica (Cathedral Wash; NB3)
27.8 − 87.42 White, translucent granular microcrystalline silica (Cathedral Wash; NB5)
  1. aReproducibility for δ18O is ± 0.2‰ and δD is ± 2‰. Reproducibility is based on duplicate runs and standards