sand - large-grained quartz dune sand from Monastery Beach, Carmel Bay, California - set of two 2-ounce jars Pyrite is used as an

Pyrite is used as an iron ore where iron oxide ores are not available

The grains were blown against each other in a huge dune field

Macrolepidoptera of the World was started as a multi-volume multi-year project before 1906

Some time ago the trash was almost all cleaned up

The Navajo sandstone is widely  exposed in southern Utah and forms the colorful crossbedded cliffs at Zion National Park

sand - large-grained quartz dune sand from Monastery Beach, Carmel Bay, California - set of two 2-ounce jars Pyrite is used as anThis sand is interesting because of the large size of its quartz grains for a dune sand. Monastery Beach is fed sand immediately by San Jose Creek and by the Carmel River farther north. The longshore current that moves sand from north to south along Californias coast contributes to this beach, but the size and irregular shapes of these grains tells us that the primary source must be a local and not particularly long drainage, most likely San Jose