Quote: Geologists want to postulate that massive sedimentary structures were laid down a little at a time, over long periods of time. In some cases this may be true or it may not.
Ok real life, the difference between a geologist and someone on a chat line is that the geologist is usually responsible to wisely spend someone elses money to determine correct answers to the the above, since the sedimentation rates may be controlling factors of important economic deposits. You make it sound like geologists just sit around bars and postulate things that only become debatable fodder for the untrained . They dont, they are keenly aware of the relationship that their applied science and someones money have to each other, let alone the chain of evidence that each little fact helps build.
You (and your ilk) have no responsibilities and parallel with that charge , you have no need to gain any in-depth knowledge about how fluid mechanics,chemical sedimentation, diagenesis, and tectonics work.
To you, I have no basis with which to argue as a colleague (or even as an instructor). Not because I dont wish to, its just because I do this for a living and , by being mostly ignorant of th e foundation LAWS (including gravity bucko) and theories,you would not derive any more from my offerings of literature resources in which you could consult, because youre starting to regress to a level beneath first year students.Im sure you know better, its just that you wish to stand on a principal, no matter how silly.
Once more though. Sediment layers are environment specific. There are sed layers that accumulate quickly (landslides, turbidity currents in deep ocean mudslides, tsunami benches, earthquake talus). Then there are the vast majorities of sedimentary layers that accumulate at a rate of a few centimeters to up to a tenth of a foot per year. For example, How can you have a quickly emplaced thick layer of LIMESTONE in a turbid (high energy) environment. You cant, these are mutually exclusive schemes. Limestones need quiet shallow waters and thickening basins. We have limestone deposits up to 4miles thick in places of the US and the world. Likewise, Beach sands are slowly migrating deposits laterally and vertically (according to WAlthers Law) a beach represents a narrow high energy fringe of land and water. If the beach progrades (moves in) the beach deposit is seen to migrate inland and a normal ocean silt and particulate deposit covers this from seaward. These deposits are quite common worldwide and they represent good places to locate oil sands.The beach sand deposits and alluvial fan deposits are usually thin(a few hundred feet maybe) but they represent a conveyance for oil to migrate to a trap where we can conveniently drill it.
Other types , likeLacustrine silts and clays, varve deposits, fluvial deposits, cannel coals and peats, coal beds and palludal deposits all have their unique rates of average deposition and there are many other specific and unique sed types which we study for economic, as well as academic reasons (spits, sand bars, moraines, eskers, karst features, etc)
You seem to want a "one size fits all" mentality in sedimentary rocks.It doesnt work that way and , maybe the next geologist wont be so kind with you when you display your own special"geological analyses" on a chat line.
I know that the creationists are fond of not understanding basic geological principals , but not letting that stop them from excoriating geologists who work in the field every day. For your vast lack of knowledge in the subject and your stubborn stick-to-itivness to remain ignorant, I would like to offer the awards committee your name in nomination so you get the 2005 Duane Gish "No NO it aint so award"
The hell of it is, with the exception of a lot of the theoretical parts of geology, it is one of the most accessible and observable sciences out there. Sure , we use fancy tools but hell, theyre no more complex than an engine analyzer or a VTVM. My suspicion is that you dont want to read so that you can ask your dumass questions and sound almost astute. If youd read an introductory geology /sedimentology text, youd see that these very questions have been answered since "Strata Smiths days"