The Green River Formation of Colorado, Wyoming, and Utah contains alluvial fan deposits and playa evaporites created in a huge lake whose level fluctuated for millions of years.

• 科罗拉多，怀俄明州和犹他州的绿色河形成含有扇形冲积物和在一个长达数百万年水面涨落的巨大湖中产生的沙漠盆地蒸发盐。