Monday, January 14, 2008

Walking the firstTerrace

From Wikipedia, the free encyclopedia
"A terrace may refer to:
Terrace (agriculture), a leveled section of a hilly cultivated area, designed to slow or prevent the rapid run-on of irrigation water
Terrace (building) timm
Terrace deposit, geological term for a flat platform of land
Terrace (gardening), an element where a raised flat paved or gravelled section overlooks a prospect..."

Stream terrace, sediment from an old stream, usually in an elevated aspect relative to the current streamway

A terrace deposit is geological term for a flat platform of land created alongside of a river or sea, where, at some time in the past, the river has cut itself a deeper channel. The former floodplain of the river is therefore at a higher point and is known as a terrace. Rivers can create a sequence of terraces over millennia as they erode away more material.

Terraces are formed by river rejuvenation, when the river gains in gravitational potential energy. The terraces themselves are often made from fluvial material previously dumped by the river to create the earlier floodplain, These terrace deposits are broadly horizontal layers of gravel, sand and finer sediments that can sometimes contain prehistoric archaeological finds."

The floodplain where these stones are was once probably a glacial lake, the first terrace the glacial lake plain.

Hooked beak (like a turtle)?

The last post happened along the turtle's left rear leg. Is that hill another turtle resting it's head on the flat floodplain turtle?

So are you now at the second terrace, up on this turtle's back?

Which definition of terrace would that be?

Follow that stone row that the turtle's backbone and you end up at a rock shelter sort of place...

Back down to where the floodplain meets the first terrace...

...and the one of the streams in the distance.

And looking back toward those stones is an entirely different view: the torn up track of ATVs cutting into the mysterious stone row, destroying something of historic significance, something perhaps even "prehistoric"...

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