Follow the chronology of prehistoric dates that were significant for the ancient residents of Chimney Rock National Monument:|
Ancestral Puebloans migrated into the Piedra River area.
950-975 A.D.: Ridge House construction Phase I.
July 1054 A.D.: The supernova, which produced the Crab Nebula, was visible in the daytime sky for three weeks and in the nighttime sky for about two years.
December 1057 A.D.: At the winter solstice, the full moon rose between the chimneys, and archaeoastronomists speculate this was observed as an important event by the residents of Chimney Rock.
1064 A.D.: Sunset Crater erupted north northwest of Flagstaff, AZ.
1066 A.D.: Hailey's Comet appeared on the eve of the Battle of Hastings. The comet covered one-fourth of the nighttime sky.
1073-1077 A.D.: Period of a Major Lunar Standstill. It is estimated that the moon appeared between the chimneys on more than forty occasions.
1076 A.D.: Possible Great House construction Phase I during Major Lunar Standstill.
1077 A.D.: Sunspots large enough to be seen with the naked eye were reported in China, beginning two hundred years of unusual sunspot activity.
1078 A.D.: Ridge House construction Phase II.
1084 A.D.: Great Kiva construction began not much later than 1084.
1093 A.D.: Great House construction, possibly second phase.
1094 A.D.: Major Lunar Standstill
July 11, 1097 A.D.: Total solar eclipse passed directly over Chimney Rock.
1111 A.D.: Major Lunar Standstill
1125 A.D.: People left Chimney Rock.
1150 A.D.: Chaco decline begins.
1100-1200 A.D.: Drought and cooler temperatures.
1280 A.D.: People left Mesa Verde.
1300 A.D.: Four Corners area empty of Ancestral Puebloans.
Following is an Ancestral Puebloan Culture Time Line from the 1928 Pecos Conference:
|Basketmaker II||0 - 400 A.D.||Pine|
|Basketmaker III||400 - 700 A.D.||Sambrito|
|Early Pueblo I||700 - 850 A.D.||Rosa|
|Late Pueblo I||850 - 950 A.D.||Piedra|
|Early Pueblo II||950 - 1050 A.D.||Arboles|
|Late Pueblo II||1050 - 1150 A.D.||Chimney Rock|
|Pueblo III||1150 - 1350 A.D.|
|Pueblo IV||1350 - 1600 A.D.||