Tops of intersecting clusters of Spirophyton. Scale in most photos is 15 cm long.

Spirophyton showing pronounced central projection (boss)

Plan view of Spirophyton. Possible marginal tube.

Crude, large Spirophyton depression at topmost surface of shallowing-upward sequence

Vertical section showing profile of Spirophyton in sandstone, probably mud-filled from overlying stratum

Side of bed thoroughly bioturbated by Spirophyton. Each lighter gray horizontal bar is one lamella (?) of a cluster. About 5 cm to the left of 8.5 cm on the scale one can see meniscate structure opening to the right.

Several profiles of Spirophyton near top of sandstone storm bed interbedded within Spirophyton-bioturbated silty sandstones (see above)