environment/inarticulates

[o.a.hoel@xxxxxxxxxxxx (Ole Andreas Hoel)]

Hi everybody!
I am working on trilobites from the Tremadoc-Arenig interval in Norway. Here
it seems to be a hiatus cutting out the Megistaspis armata zone. In the beds
just above this hiatus there is very few trilobites, but a lot of
inarticulate brachiopods (Acrotreta, obolus and lingula). Is there anybody
who have suggestions on what kind of depositional environment this is an
indicator of (if any)?.