The property is located at Klashwun Point, at the north end of Graham Island, Queen Charlotte Islands. The showings occur along the shoreline for about 152 metres, just north of Indian Reserve 13.

Two claims were located on the showing in 1955 by Joseph Pauloski. He shipped a 200 pound sample to the Mines Branch, Ottawa in 1961; the sample assayed 23.4 per cent manganese.

In 1965 the property consisted of 17 recorded claims held under the name Naden Harbour Manganese Ltd. During May 1965 Falconbridge Nickel Mines Limited took out bulk samples of the order of 150 to 200 tons of fresh material and drilled 77 metres in two packsack diamond-drill holes. The positions of the holes did not provide conclusive results. One hole may have penetrated the fault zone; the other hole intersected it at a narrow locality, although the breccia lens adjacent on the surface is large. A visual estimate of tonnage and grade is 15,000 tons at 15 per cent manganese.

The property was held in 1980 as the Shag 1-2 claims (35 units) by Glen White, of Richmond. Work included a geochemical soil survey comprising 220 samples.

The area is underlain by Tertiary volcanics of the Masset Formation consisting of amygdaloidal basalts, basalt flows and porphyritic andesite sills which strike north to northeast and dip 15 to 20 degrees east. A fault, striking 015 degrees and dipping 80 degrees east, crosscuts the lavas. East of the fault, the lavas are underlain by 23 metres of dark-grey shale and buff-coloured, calcareous shale to sandstone, which resembles the Queen Charlotte Group, Cretaceous Skidegate Formation.

The fault is filled with 1.5 to 4.5 metres of volcanic breccia, cemented by manganese minerals comprised mainly of manganite, pyrolusite, housmannite and jacobsite. Veinlets of manganite also extend into the volcanic rocks in the footwall. The showing is exposed along shore for about 168 metres. The manganese values assay up to 50 per cent and average 15 per cent manganese. At the northern end of the exposure a higher-grade lens measuring 15 by 2.4 by 1.5 metres contains between 30 to 40 per cent manganese (Minister of Mines Annual Report 1960, page 11).