| Surficial Sediments | |
|---|---|
| af | Artificial Fill |
| Qhym | Mud deposits (late Holocene) |
| Qhy | Alluvium (late Holocene) |
| Qha | Alluvium (Holocene) |
| Qs | Beach and dune sand (Quaternary) |
| Qsl | Hillslope Deposits (Quaternary) |
| Qpa | Alluvium (Pleistocene) |
| Qt | Marine terrace deposits (Pleistocene) |
| Qoa | Alluvium (early Pleistocene) |
| Overlying Rocks | |
| QTs | Sediments (early Pleistocene and (or) Pliocene) |
| QTv | Volcanic rocks (early Pleistocene and (or) Pliocene) |
| Tps | Sedimentary rocks (Pliocene) |
| Tpv | Volcanic rocks (Pliocene) |
| Tpms | Sedimentary rocks (Pliocene and early Miocene) |
| Tpmv | Volcanic rocks (Pliocene and early Miocene) |
| Tms | Sedimentary rocks (Miocene) |
| Tmv | Volcanic rocks (Miocene) |
| Tmos | Sedimentary rocks (Miocene and (or) Oligocene) |
| Tmov | Volcanic rocks (Miocene and/or Oligocene) |
| Tmoes | Sedimentary rocks (Miocene, Oligocene, and (or) Eocene) |
| Tos | Sedimentary rocks (Oligocene) |
| Tov | Volcanic rocks (Oligocene) |
| Toes | Sedimentary rocks (Oligocene and (or) Eocene) |
| Tes | Sedimentary rocks (Eocene) |
| Tepas | Sedimentary rocks (Eocene and (or) Paleocene) |
| Tpas | Sedimentary rocks (Paleocene) |
| TKs | Sedimentary rocks (Paleocene and (or) Late Cretaceous) |
| Basement Complex Rocks | |
| TKfs | Franciscan Complex sedimentary rocks (Eocene, Paleocene, and (or) Late Cretaceous) |
| fsr | Franciscan Complex mélange (Eocen, Paleocent, and (or) Late Cretaceous) |
| TKfv | Franciscan Complex volcanic rocks (Paleocene and (or) Late Cretaceous) |
| Ks | Great Valley complex sedimentary rocks (Cretaceous) |
| Kfs | Franciscan Complex sedimentary rocks (Cretaceous) |
| Kfv | Franciscan Complex volcanic rocks (Cretaceous) |
| Kfm | Franciscan Complex metamorphic rocks (Cretaceous) |
| Kgr | Salinian complex plutonic (granite) rocks (Cretaceous) |
| KJs | Great Valley complex sedimentary rocks (Early Cretaceous and (or) Late Jurassic) |
| KJv | Franciscan or Great Valley complex volcanic rocks (Early Cretaceous and (or) Late Jurassic) |
| KJfs | Franciscan Complex sedimentary rocks (Early Cretaceous and (or) Late Jurassic) |
| KJfc | Franciscan Complex chert (Early Cretaceous and (or) Late Jurassic) |
| KJfv | Franciscan Complex volcanic rocks (Early Cretaceous and (or) Late Jurassic) |
| KJfm | Franciscan Complex metamorphic rocks (Early Cretaceous and (or) Late Jurassic) |
| KJfvc | Franciscan Complex volcanic rocks and chert (Early Cretaceous and (or) Late Jurassic) |
| KJfvs | Franciscan Complex volcanic and sedimentary rocks (Early Cretaceous and (or) Late Jurassic) |
| Jv | Great Valley complex volcanic rocks (Jurassic) |
| Ji | Great Valley complex plutonic rocks (Jurassic) |
| Jsp | Great Valley complex serpentinite (Jurassic) |
| Jfv | Franciscan Complex volcanic rocks (Jurassic) |
| Jhg | Salinian complex plutonic rocks (Jurassic) |
| MzPzm | Salinian complex metamorphic rocks (Mesozoic and (or) Paleozoic) |
| Depositional or intrusive contact | |
| Fault | |
| Fault active in the Holocene (within the last 11,500 years) | |
A |
Letter showing the approximate location where a rock or fossil on this poster was found |