Figure 2: Upper Triassic bedded chert of the Sakahogi section.
From: Osmium isotope evidence for a large Late Triassic impact event
(a) Outcrop view of the claystone bed in the middle Norian bedded chert succession at the Sakahogi section. Numbers NHR30 to 51 refer to individual beds. See bed numbers NHR30 to NHR51 of Fig. 4. (b) Photograph showing detailed occurrence of claystone bed (NH52) at the Sakahogi section. The claystone bed is subdivided into six samples, NH52-R2 to R7 (see text for detail). Note that beds NH52-R4 and R6 contain radiolarians, siliceous sponge spicules and conodonts in a matrix of clay minerals and cryptocrystalline quartz. See bed numbers NH52-R2 to NH52-R7 of Fig. 4. Scale bar, 1 cm.
