The Gulf of Corinth is actively rifting, with the footwalls of large normal faults on the southern shore being uplifted by almost 1km in the last 2 million years or so(you can see some pretty spectacular striated fault scarps in the field). The combination of new and steep topography to be eroded, and a big linear hole in the ground to be filled, means that small deltas are building out into the Gulf pretty much all along its length. The variation in their size is due to differences in catchment area - the smaller deltas only being fed from the closest slopes, whereas the larger ones cut all the way through the mountains, probably in the gaps between different fault segments, and thus are supplied with much more sediment.

Understanding this interaction between faulting and sedimentation patterns is of great interest to petroleum geologists (arguably, this is what the North Sea looked like in the Triassic).

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