Coffee Crater the source of a lava flow that travelled to the southwest; it ponded against and partially overrode stagnant ice on the Big Raven Plateau.

Coffee Crater is a part of the Mount Edziza volcanic complex, which consists of diverse landforms such as shield volcanoes, stratovolcanoes, lava domes and cinder cones.

[3][7] In his 1992 report The Late Cenozoic Mount Edziza Volcanic Complex, British Columbia, Canadian volcanologist Jack Souther gave Coffee Crater the numeronym SLF-7, SLF being an acronym for the Snowshoe Lava Field.

[9] Coffee Crater is located in Cassiar Land District of northwestern British Columbia, Canada, just south of Mount Edziza at the southern end of the Big Raven Plateau.

[1][6][11] The volcanic complex consists of a group of overlapping shield volcanoes, stratovolcanoes, lava domes and cinder cones that have formed over the last 7.5 million years.

[6][17] The dominant rocks comprising these volcanoes are alkali basalts and hawaiites, but nephelinite, basanite and peralkaline phonolite, trachyte and comendite are locally abundant.

[18] Coffee Crater is a basaltic cinder cone of the Big Raven Formation, the youngest stratigraphic unit of the Mount Edziza volcanic complex.