Geograph - photograph every grid square

Binn Bhán

Meaning 'white peak' Binbane is the second most westerly summit in the Bluestack Mountain area. At 453m it has a trig pillar - because there are clear lines to much of the high ground of Donegal and north Mayo.

I climbed the southern slope which is steeper than the northern side, and apparently this is extremely unusual in Ireland - perhaps due to the southern slopes being made of gritstone, and the summit is made of "Gaugin" Quartzite. A fault on the southern slope may have caused plucking to steepen it during the last ice age, the gritstone not being as strong as quartzite.

Apparently the Bluestacks are ".. a geological nightmare - with about 10 different rock types of different ages chopped up and re-arranged by a bewildering pattern of faults "