|The steep wall|
There were lots of little vesicles, frozen air bubbles, around which had been infilled with either quartz or calcite. I presume its calcite but I didn't have any metal objects on me to actually check, calcite scratches but quartz doesn't.
I left the crag as soon the sun was starting to set and went for a walk around the park. On my way I had a look at the sill just below the long row. Its formed from micro gabbro and has some interesting features on its top surface. There are lots of parallel lines which to the untrained eye may be assumed to be glacial strai, thats what I thought they were to begin with, but are infact ripples at the hot magma was injected bettween layers in the rock.The photo below shows them, although they are hard to see.
The sandstone as you can see in the picture is red and the grains were reasonably coarse.
|Mystery sedimentary structures|
On my way home I went into the CSE were Gerry was setting some boulder problems so I helped out. He set two routes using a total of five holds. One made the most of the features on the featured wall and the other was a bridging route up the chimney.