 At the Mount Edziza volcanic complex, basalts of probable Late Pleistocene to Early Holocene age have been found, but their exact ages and chemical compositions are not well known.Because Heart Peaks and nearby Level Mountain have been poorly studied and it is unknown if they contain Holocene age volcanic rocks, they are also possible sources for the Finlay tephras.The name "Heart Mountains" was adopted in the BC Gazetteer of 1930 with coordinates placing the massif at .