Exhumed Crangon remains after 17 weeks in A) kaolinite, B) calcite, C) quartz, and D) montmorillonite. A′–D′ are the corresponding isolated remains following a screen rinse, ultrasonic bath, and 24 hours of aqueous tumbling. Scale bar in A equals 5 mm for A–D and 8 mm for A′–D′.
Nereis remains after 17 weeks in kaolinite. A) Whole specimen showing details of segmentation, parapodia, palps, and tentacular cirri; B) stained sectioned cuticle wall showing preservation of three distinct integumentary layers and preferential loss of (nonstructural) internal organs; C) SEM of parapodia with associated chaetae. Scale bar in C equals 2 mm for A, 35 µm for B, and 0.5 mm for C.
Chemical composition of Nereis and Crangon remains after 4 months of burial in differing sediment mineralogies and the control. ASW = artificial seawater; Kao = kaolinite; Calc = calcite; Qtz = quartz; and Mont = montmorillonite.