While checking the lower part of a very high bluff on Discovery Bay a bit of what might pass as modern art of some sort.
The bluff geology here appears to be possibly marine tidal units with lots of alternating sand and silts and occasional carbon rich silt to clay units a fair bit older than the last glacial period.
While checking out the rivulet patterns I notes small insect burrows in the compact sand. Clearly something stuffed inside the lined burrows that have subsequently become exposed as sand grains fall out around the burrows.
And yes it was sunny as I was in the lee side of the Olympic Range. A few miles south was socked in with clouds and drizzle.
Looking south down Discovery Bay
4 comments:
Did the rivulets follow roots from the vegetation above and outward from the present cliff location?
In this case the water tracks were not associated with roots.
Not arguing, just very curious--how do you know roots weren't there originally? What would I look for if I saw something similar to know whether the trickles were following root-holes or not?
good question. Typically the roots leave a bit of carbon behind and will also alter the soil around the root via pH or oxygenation changes. What I don't understand is why the silty/clayey rivulets lefts such distinctive tracks.
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