Fig. 2

Optical and secondary ion images of six filamentous microfossils. Series (a–f) correspond to Targets 1 to 6, respectively. Three secondary ion images obtained in CNS mode (12C−, 12C14N-, and 32S- in the blue frame) and two obtained in PMo mode (31P− and 98Mo16O− in the green frame) are arranged horizontally next to the optical images. The scale bars in each ion image indicate 5 μm.