Figure 1. Microphotographs and ESEM images.

(A) Microphotograph showing a cavity half filled with calcite and with a network of fossilized filaments attached to the mineral surfaces. The focus of the image is within the cavity. (B) Microphotograph of an euhedral calcite crystal covered in a yellow-brownish kerogenous film. Note the close association between the film and filamentous structures. (C) ESEM image of a quartz crystal where the kerogenous film has been removed from one side. (D) ESEM image of a network of filaments with incorporated mineral grains. (E) ESEM image of a network of filaments attached to one side of a vesicle. (F) Microphotograph of the network shown in E as comparison of the colour variations. (G) Close-up of filaments attached to a mineral surface.