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View of the ancient Maya city of Tikal, Guatemala |
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Map of the Maya Area and its boundaries, from Coe, 1987 |
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Temple I at Tikal, Department of Peten, Guatemala |
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Palace from Tikal, Department of Peten, Guatemala |
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Timeline of the Maya Civilization, from Coe, 1987. |
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Quantitative representation of the Classic Maya Collapse, from Lowe, 1985 |
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Symptoms of the Classic Collapse. |
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Proposed causes of the Collapse |
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Contour map of the modern annual water deficit on the Yucatan Peninsula. |
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Yucatan Peninsula with the Koeppen climate classification system. |
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Lake Chichancanab looking towards the eastern hills. |
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Lake Punta Laguna located in the northeastern section of the Yucatan Peninsula |
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Hydrologic cycle of a closed-basin lake |
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Pie diagram illustrating the dissolved ion content of Lake Chichancanab. |
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Gypsum crystals (CaSO4) found within the littoral zone of Lake Chichancanab |
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Pie diagram illustrating the dissolved ion content of Lake Punta Laguna |
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Oxygen isotope balance of closed basin lakes. |
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Oxygen isotopic ratio of rainfall/groundwater, Lake Chichancanab & Lake Punta Laguna. |
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Interpretation of how changes in the lake sediment record detail climate change |
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Dr. Jason Curtis holding the mud-water interface corer from Lake Chichancanab. |
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Extruded core from Lake Chichancanab with abundant white shell material in the core. |
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Example of ostracod shell, genus Candona |
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Example of gastropod shell, Pyrgophorous coronatus |
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Front view of a gaseous-source stable isotope mass spectrometer. |
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Data from the Lake Chichancanab |
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Oxygen Isotope record of Punta Laguna and Chichancanab, from Curtis et al. 1997 |
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Comparison of data ostracods and Maya cultural periods, from Curtis et al. 1997 |
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Comparison of the oxygen isotope record of ostracods with the microparticle concentration data. |
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Chac the Rain God |