Fig. 5

Thin section photographs, plane polarised light: a chlorite replacing orthopyroxene and plagioclase as well as filling pore space in the matrix; b amygdule filled with calcite and rimmed by chlorite and quartz (Valle, Val Oropa); c pore space in the matrix of the conglomerates filled with hematite and lepidocrocite. The early infiltrations are represented by dark red lamellae; later fillings are lighter red