2006-11-12 14:48:44 · 4 answers · asked by mydestiny3000 1 in Science & Mathematics ➔ Geography
the sbdo mts are the head waters for several rivers that end in the pacific.
the specific river that would go to oc is the santa ana
it parallels the riverside (91) freway thru the santa ana canyon. looking at the bed you see a lot of high grade sand.
if you look at the cemented in portion of the river, you'll see that after the rainy season big earth movers are in it to remove all the alluvia deposited.
geologically, in the last 25000 years the santa ana has flowed from the bluffs of newport beach to the san pedro hills, so that for the most part the entire area is river bottom silt.
2006-11-12 15:27:48 · answer #1 · answered by elmo o 4 · 0⤊ 0⤋
My guess is that eroded bits of mountain get washed downstream in the form of sand, which forms beaches.
2006-11-12 22:51:57 · answer #2 · answered by iansand 7 · 0⤊ 0⤋
Erosion from the mountains and deposition on the beach
2006-11-12 22:52:22 · answer #3 · answered by geo3598 4 · 0⤊ 0⤋
That's a very good question. Perhaps the mountains are made up of sandstone?
2006-11-12 22:50:46 · answer #4 · answered by Christine4tw 3 · 0⤊ 0⤋