group of 4, largest is 800 ft. long, extend 0.8 mi., near E shore of Revillagigedo Channel, N of Boca de Quadra, Coast Mts.
Named "Slate Islet" in 1793 by Captain George Vancouver, Royal Navy (RN), because it is "entirely composed of that rock;" published in 1883. Coast Pilot (p. 71).
Alava Bay, Bullhead Cove, Butlhead Cove, Customhouse Cove, Foggy Bay, Kah Shakes Cove, Kah Shakes Lagoon, Lucky Cove, Mary I Anchorage, Morse Cove, Ray Anchorage, Reef Harbor, Sykes Cove, Very Inlet,
Capes:Point Nelson, Point Alava, Ape Point, Bass Point, Cape Fox, Duke Point, Edge Point, Flag Point, Foggy Point, Fox Point, Giant Point, Grave Point, Kah Shakes Point, Kirk Point, Orca Point, Quadra Point, Roe Point, Short Point, Point Sykes, Tent Point, Point Winslow,
Channels:Cat Passage, Danger Passage, Narrow Pass, Revillagigedo Channel,
Hills:Islands:Bird Island, Black Island, Black Rock, Carp Island, Cat Island, Danger Island, De Long Islands, Duck Islands, Fripo Island, House Rock, Lane Island, Little Rock, Mary Island, Rudyerd Island, Slate Islands, Snail Rock, Twin Islands, Whale Rock,
Lakes:Mountains:Backbone Mountain, Behm Mountain, High Mountain, North Quadra Mountain, Notch Mountain, South Quadra Mountain,
Ridges:Alava Ridge, Saw Ridge, Saw Ridge,
Streams: