ED, since you keep ignoring this post on the Tiktaalik thread I'm going to post it here in the hopes that you will eventually address it. What say you?
No, it isn't. Ecological Zonation, the YEC explanation you are referring to, is not compatible with the fossil record.
For example, dolphins, whales, sea turtles share the same Ecological Zone/specific environment (salt water oceans) as plesiosaurs, pliosaurs, and archelons. However, they are NEVER found together in the same layer of sediment.
Another example, elephants, buffalo, and sheep share the same ecological zones (grasslands and woodlands) as Brachiosaurs, Anklyosaurs, and Wannanosaurs. Yet they are NEVER found together in the the same layer of sediment.
Finally, sparrows and finches share the same ecological zones (the air) as pteranadons and pterodactyls yet are NEVER found in the same layer of sediment.
How does YEC geology explain this? The other two favorite YEC explanations, Hydrological Sorting and Differential Escape fail to explain it as well (and each has their own fatal problems).