I think you underestimate the magnitude of the biblical Flood–where transgressing & regressing ocean waters left one-to-two-miles-thick sedimentary rock layers on every continent.
Certainly, “catastrophic floods don’t produce life”! Instead, massive catastrophic flood sediment flows broke shells and plates into fragments while packing them tightly together in a calcium carbonate medium, which diagenesis turned into limestone.
“You need a stationary sea to get that many crinoids stacked up”
Who says? When have you observed the assemblage of such a layer of sediment–to be able to judge what will work and what will not work, in causing it to happen?
Think about the Tonto Group of rock layers in the Grand Canyon. The Tapeats Sandstone is 290’ thick…the overlying Bright Angel Shale is 375’ thick…and the overlying this, Muav Limestone is 650’ thick. A total of about 1315’ of sedimentary rock layers.
And ALL of these were deposited by a single oceanic wave of the Sauk transgression. Yeah, seems impossible to us, because we simply have not experienced (nor do we want to!) flooding of that magnitude. But it did happen!
You say, “You can’t get 2,000 feet of crinoid plates from a single catastrophic event.”
So, please explain the process that you envision, to account for this layer of limestone with all these crinoids.