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Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: The pteropod species Heliconoides inflatus as an archive of late Pleistocene to Holocene environmental conditions on the Northwest Shelf of Australia

Fig. 4

Optical microscopy and SEM images of selected H. inflatus samples. (a) Most pteropods in the studied core material are very well preserved (LDX = 0), including lustrous and transparent shells (Site U1463; 12 ka). (b) The preservation of some shells from Site U1463 (6–8 ka) exhibits slight deterioration (LDX = 0–1). Single shells partly have an opaque milky white color or a cloudy appearance (white arrow) (Site U1463; 7 ka). (c) SEM image of a slightly corroded pteropod. The black square indicates the location of (d) (Site U1463; 7 ka). (d) Dissolution of a pteropod as evidenced by the rough surface of part of the shell (white arrow) (Site U1463; 7 ka)

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