Mixed Siliciclastic/Carbonate Systems - Trace Fossils as Indicators of Sedimentary Environments - page 799

FIGURE 10 Glossifungites surfaces within the fluvial-lacustrine Green River-Wasatch section
(Early-Middle Eocene), Little Muddy area, southwestern Wyoming, USA. Adapted from Zonne-
veld et al. (2003) . FA1 through FA6 are facies associations discussed in depth in Zonneveld
et al. (2003) . Acronyms for the Wentworth Grain size scale at top are as follows: vf (very fine),
f (fine), m (medium), c (coarse), and vc (very coarse). Sequence-stratigraphic divisions follow
Zonneveld et al. (2003) . Sequence-stratigraphic acronyms include LFS (lacustrine flooding surface),
RSE (regressive surface of erosion), MLFS (maximum lacustrine flooding surface), and ITS (initial
transgressive surface). (A) The two sections illustrated are separated by

95 m of vertical section.
(B) Cross-stratified sandstone erosionally overlying a carbonate mudstone, Tipton Shale/Wasatch
Formation contact. (C) Close-up of the Thalassinoides network from (B). (D) Close-up of pseudo-
Diplocraterion (serendipitous cut through a meandering Planolites isp. burrow) from (B).