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Fig. 4 | Journal of Palaeogeography

Fig. 4

From: Paleosols in an outcrop of red beds from the Upper Cretaceous Yaojia Formation, southern Songliao Basin, Jilin Province, NE China

Fig. 4

Photographs showing field characteristics of the soil horizons in paleosols of the Yaojia Formation. a Calcic horizon (Bk) recognized by calcareous layers (marked with yellow arrows); note the greyish green claystone (under the black dotted line) and greyish white very-fine sandstone (under the yellow dotted line) indicating discontinuity of the petrogenesis process; b Greyish green mottles in gleyed horizon (Bg) of the paleosols (marked with yellow arrows); note the shiny clay films in the argillic horizons (Bt) marked with black arrows; c Reticular, mottled red paleosols in gleyed horizon (Bg) (marked with yellow arrow); d Slickensides recognized by polished and striated stress surface in the vertic horizon (Bw) of paleosols (marked with a yellow arrow); burrows are found in the overlying cross-bedded red siltstone (marked by the dotted line), indicating the pedogenesis interrupted by deposition of the siltstone; e Cutans on inclined planes in the argillic horizon (Bt) marked with yellow arrows; f Cutans on vertical planes (marked with yellow arrows) in the argillic horizon (Bt) with subangular blocky structure

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