how do million year old rivers have thousands year old deltas
i was looking at ancient maps and realized how "quickly" silting process is in creating land masses, with ancient shorelines being sometimes hundreds of kilometers behind just a couple thousand years back, since rivers are *old*, most hundreds of thousands, many millions of years old in their current valley, how are the deltas and land deposits so relativly few. the meander river pictured here is roughly 500 km long, and 20% of that is from 800 BC onward?. does silting speed up with time?
Posted May 4, 2025, 4:36 PM UTC
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