Granodiorite of Mount Harvard
Granite. Mesoproterozoic, about 1,600 to 1,000 million years old. 1 crag on this site has its map point on it.
What the map says
Gray, medium-grained to coarse-grained, equigranular to porphyritic, weakly foliated biotite granodiorite at and near Mount Harvard. Composed, in decreasing amounts, of sodic plagioclase, perthite, quartz, biotite, chloritized biotite, opaque minerals, and minor amounts of apatite and zircon (Fridrich and others, 1998). Previously mapped as Paleoproterozoic Denny Creek Granite (Fridrich and others, 1998), but new U-Pb zircon age of 1,414±20 Ma (Moscati and others, 2017) indicates that this pluton is of Mesoproterozoic age
1:100,000 sheet: Kellogg and others, 2017, U.S. Geological Survey Scientific Investigations Map 3382 (1 crag). A contact line at that scale is about 100 m wide on the ground.
Served by Macrostrat (CC BY 4.0). The wording is the map's own, quoted as a fact about the mapped unit, not about any one wall.