notes on lava (copy of notes 7/15/06)
1st stop Cullaby Lake oldest lake basin. sand here was beach.
3-4,000 ya source for lake is rainfall
hills behind land arc 40-45 mya Marine seds of that time coast was where PDX is now. These hills were coastal shelf.
Inflow from dune complex and rain to streams in coast range see fig. 2+3
—> down the road wetlands spruce, scotch broom skunkweed. pg.1
beaver dams wetlands
marshyplace
Largest continuous bog on Oregon Coast
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- illistration here -
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Why is the bog at a higher elevation then the water table? ——–
[Fe]
differences in bottom seds. If uniform sand wetland should be equal in elevation to the lake. from the lake it looks lower (wetland) pg. 2
potentimetric surface is surface of water table.
Process of wetland being above the lake water level.
{more more more bad pencil graphics}
When Ox meets Ox Fe percipitates out cementing sand grains together.
(Culluby Ridge)
-seastacks here are hummucks made of 30-40 mya marine seds. pg. 3
ARCADIA BEACH STOP
seastacks let us know where old shorelines used to be
CRB—> estuary on coast density differences
{beautiful illistration of basalt entering unconsolidated marine seds in proto-coastal marine environment}
Invasive Lava Flows
17-15 mya from trans cascade lowland
*density differences {illistarte geology chair mike cummings with his arms in the sand on his belly up to his sholders} pg.4
Ridge system. Dirt McGirt Motherfucker.
In between are Marine sedimentry rocks that have eroded away.
Then we went to the Tillamook Cheese Factory. I ate a root beer float and spoke to the bus driver and mike cummings about the current day status of soda fountains in the USA.