Here we seem to see more filling of the basin, and I get the feeling, form the description, of a series of slopes being created.
Is this a continuous process? Or are these a real series of discreet steps? From the description in Message 161:
Inferred sedimentary environment: distal turbidites. Following basin subsidence, which resulted in deeper water shale setting, terriginous sediment was occasionally cascading down the delta front as the delta was growing (in a basin-ward direction) and some of the sand and silt made it far enough to settle out atop the shale
it looks to me like we are now seeing larger particles settling out which implies that the flow is slower.
To all our geologists, please help. So far we are still in the sub basement of the Grand Canyon and have miles to go before we sleep, miles to go. Our last glimpse was of the Dox formation and if someone could pick this up by explaining what happens between the Dox and the next higher layer I would appreciate it.Aslan is not a Tame Lion
We are holding off on the layer above until we determine all we can about the layer we are on.
You mention "supracrustal". That's yet another new term in this thread. Can you explain what that means?
And how does a geologist tell whether rock has been "metamorphosed"? How is this different than the intrusions found in the Vishnu Schist?
How thick is the Cardenas layer? Can we tell things like directionality? Are there signs of weathering or erosion and if so, what do they tell us? Is it all one lava flow or is it a series of events? If a series, how is that determined?
What do we know about the intersection of the lower Dox Sandstone and the Cardenas Lava Flow(s)?