9 - Benllech - Menai Bridge
Great Sandstone Pipe
In a cliff between Trwyn Dwlban and Castell Mawr ,erosion has created a cross sectional view
of a Sandstone Pipe infilling a solution hollow ( pot hole) in the Limestone .
Giving the appearance of an upstanding plug of Sandstone above a small cave.
Ref: NW 1991
Date: 15/04/2023
Location: SH 5322 8172
