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RT @AZGeology: Mapping the channel floor of the Colorado River at #GrandCanyon. Joint NAU-USGS project. #SandTransport https://t.co/kSSSLEp…
RT @AZGeology: Mapping the channel floor of the Colorado River at #GrandCanyon. Joint NAU-USGS project. #SandTransport https://t.co/kSSSLEp…
Mapping the channel floor of the Colorado River at #GrandCanyon. Joint NAU-USGS project. #SandTransport https://t.co/kSSSLEpT78 https://t.co/qOiVI2HiGw