Re: How many samples along the whale evolutionary path should we expect to find?
I agree that the evolution of whales from land mammals to aquatic mammals is well represented by fossil evidence. For those that disagree with this, however, there is substantial evidence in other areas to further prove the evolution of whales from land to water. As can be seen on the website: http://www.talkorigins.org/features/whales/ there is evidence in eight areas besides fossil records showing whale evolution. These areas include: morphological evidence, molecular biological evidence, vestigial evidence, embryological evidence, geochemical evidence, paleoenvironmental evidence, paleobiogeographic evidence, and chronological evidence. With these many separate areas of study all pointing towards a whale transition from land to water, it is almost impossible to argue that whales have always lived in the sea.
I think you are going to have to clarify this question considerably. What do you mean by 'pre extinction ages' ? Extinction of what ?
The whale intermdiate fossils have been found on what is now dry land, most of them in Pakistan, but they represent bearlike creatures that foraged in shallow seas, so the fossils themselves were not formed on land.
BTW I think Randman has been permanently suspended here so I wouldn't hold my breath waiting for him to answer.