The Goosenecks of the San Juan River in southeastern Utah is a textbook example of what geologists call an entrenched meander. Rivers flowing through flat areas have a tendency to meander in a snaking course across the landscape. The San Juan originally flowed across a flat landscape in the distant past. The Monument Upwarp gradually elevated the land over millions of years as the river continued to cut down, slowly enough as to not disrupt the meandering course of the river before it had trapped itself in its own canyon. The meander is now entrenched in a twisting canyon 1,000′ deep at this location.