Talus caves includes a wide variety of California caves
Some are boulder piles, some are sculpted canyons, some are tall, narrow, fracture caves.
Talus caves can be found across the state.
These caves form from fallen boulders or incised canyons, often on faults most often in granite but also other types of rock. A number of these caves mix boulder and bedrock passages. Because fallen rocks and faults are common in California, there are many of these caves. Most are small, only a few are large. The larger ones usually have cave streams. These erode downward with mechanical erosion different from the dissolution erosion of limestone and marble caves. That points to another name for these features, corrasional caves.
Many of the granite caves in these photos are in the Sierra Nevada. They seem to frequently form downstream from volcanic rocks. Particles of those rocks combined with a steep stream can erode the hard granite.
