地理漫步·世界地理英语30篇（3）
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The Deccan Traps: Volcanic Stratigraphy as Landscape Memory
德干暗色岩：火山地层作为地貌记忆
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The Deccan Traps cover 500,000 km² of west-central India with layered basalt flows up to 2,000 meters thick.
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These eruptions occurred over ~1 million years around the Cretaceous-Paleogene boundary, possibly influencing global climate and extinction events.
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Each flow unit cooled at different rates, creating columnar jointing, weathering-resistant plateaus, and fertile black cotton soils.
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River valleys like the Godavari cut vertically through trap layers, exposing cross-sections that reveal eruption frequency and gas content.
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Lava tubes and basalt caves host unique bat colonies adapted to stable, cool, high-CO₂ microclimates.
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Geographers analyze how trap topography directs monsoon winds, causing sharp rainfall gradients across short distances.
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Laterite caps form selectively on older flows, indicating past humid climates and guiding groundwater recharge modeling today.
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Urban expansion in Pune and Nagpur confronts engineering challenges posed by fractured basalt aquifers and variable bedrock depth.
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Satellite thermal imaging detects subtle surface temperature differences linked to subsurface flow pathways in weathered traps.
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Rather than viewing volcanism as a single catastrophic event, this province demonstrates how layered time becomes tangible terrain.