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Detailed study describes landscape changes in river valleys over thousands of years, indicating climate impacts.
• First detailed late-Quaternary landscape evolution study of rivers in the Sand Hills. • Gradual alluvial aggradation in river valleys from ca. 12.8–8.0 ka; marshes common. • Increased aridity from 8.0 to 3.0 ka triggered landscape instability and erosion. • Episodic alluvial aggradation and landscape stability after ca. 3.0 ka. • After 1.2 ka, rivers incised and alluvial fans (7–8 m thick) rapidly aggraded.
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Mandel et al. (2026) studied this question.
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