Is this Marram?

Is this Marram?

Observation - Is this Marram? - UK and Ireland. Description: I'm familiar with Marram in a sand dune habitat but this was growing in a fine, loose, shale scree part way up an exposure of the Staithes sandstone formation at Staithes, N.Yorks.

I'm familiar with Marram in a sand dune habitat but this was growing in a fine, loose, shale scree part way up an exposure of the Staithes sandstone formation at Staithes, N.Yorks.