Inca Empire cca extended from present Columbia to N Chile Cuzco organizational and spiritual center
Environmental conditions Altitude: mean- 5,200m Temperatures: -25C Winds: > 100km/h Dry conditions
Glacier mummies: climate records? 500-year old mummy found in Peruvian Andes Otzi- 5,000 year old mummy found in Tyrolean Alps, Italy Glacier retreat revealed mummy
Archaeological sites and mummies have been found in the Andes at altitudes up to 20,000ft Incas constructed the sites in the 15 th century to appease the mountain gods Human sacrifice: Capac Cocha ritual Mountain worship in the Andes
Volcano Llullaillaco, Argentina, highest archeological site (~21,000ft)
Peaks in the Andes are still worshipped to this day, eg. Mt.Ausangate
Andes: Mountain as source of Water and Fertility Verticality is important Source of water Gods of meteorological phenomena, controlling crops and cattle Places of astronomical observations
Present day pilgrimage to Qoyllur Rit’I, Peru
Sinaqara Glacier, pilgimage site
Qoyllur Rit’I, Sinaqara Glacier, S.Peru S.Peru Taking “medicinal” ice from the glacier as a symbol of water sources and fertility
Ice core climate evidence Source:Thompson 1994 INCA Quelcaya Ice Cap, Peru
Study Area: Cordillera Ampato, southern Peru. Nevado Coropuna (stratovolcano complex covered by an ice cap and consisting of three peaks, with the highest one at 6,426m).
Why Coropuna? Archeological evidence from Spanish chronicles Highly worshipped mountain; Water source for nearby villages; Coropuna is believed to contain Inca ruins and human sacrifices offered to the mountain deity. Source: Guaman Poma de Aylla [1613]
Criteria for archeological site prediction Slope:0-5 deg (flat surfaces) Elevation:between m Accessibility: Inca roads/routes proximity to least-cost pathways Aspect (Orientation): East (NE or SE) direction Visibility: Pacific Ocean/other peaks visible
The effect of topography (slope) on movement across mountain terrain Cost (Energy or Time) increases as terrain gets steeper Actual energy can be calculated by including physiological measurements, weight of individual and load carried.
Site location potential: probability of site location as a function of distance to least-cost pathways