This is a small section of a map in US Geologic Survey Bulletin 375, published in 1909.
The largest area on the map is Pre-Ordovican quartzite, quartz-mica, carbonaceous and hornblendic
schists and crystalline limestone.
- Igneous: Granitic, dioritic and more basic rocks.
- Tertiary: Clay, sandstones, lignites, shales and conglomerates.
- Devonian: Phyllites, quartzites, cherts, limstones,
greenstones, slates and tuffs.
- Gold placers.
The black square below and to then left of "Chicken P.O." is the location of Chicken.
A Guide to Chicken, Alaska