Creationist view of radiometric dating real girls for dating
[Patton introduces an ellipsis, apparently solely to mark the beginning of a new paragraph.] If the carbon dioxide dissolved in sea water decreases, some bicarbonate ions change to carbonate, thereby causing precipitation of calcium carbonate. Most are biogenic, and consist primarily of microscopic or macroscopic shells (or at least these make up a considerable fraction, and often almost all, of the rock volume).
The precipitate forms a fine, crystalline cloud which settles to the bottom. This is true of limestone production today too, most of which is in association with biological activity.
If you are a creationist you may think that this is special pleading.
My point here is that, when we are talking about gaps of this magnitude, there is no difference whatever in the interpretations of `punctuationists' and `gradualists'.
The chapter from which this quotation is taken deals with the ``controversy'' between gradualism and punctuated equilibrium.
Dawkins's point is that the argument is trivial, compared to the amount of media furor it has raised.
This report of fish material from Upper Cambrian rocks further extends the record of the vertebrates by approximately another 40 million years. Repetski, ``A Fish from the Upper Cambrian of North America,'' But, as by this theory innumerable transitional forms must have existed, why do we not find them embedded in countless numbers in the crust of the earth?
It will be much more convenient to discuss this question in the chapter on the Imperfection of the geological record; and I will here only state that I believe the answer mainly lies in the record being incomparably less perfect than is generally supposed; the imperfection of the record being chiefly due to organic beings not inhabiting profound depths of the sea, and to their remains being embedded and preserved to a future age only in masses of sediment sufficiently thick and extensive to withstand an enormous amount of future degradation; and such fossiliferous masses can be accumulated only where much sediment is deposited on the shallow bed of the sea, whilst it slowly subsides.
Because of these relations, there is a direct connection between atmospheric carbon dioxide and the amount of dissolved calcium ion in sea water. One look at the rest of any texbook on sedimentology, and you will realize that most limestonare not inorganic anyway.The crust of the earth is a vast museum; but the natural collections have been made only at intervals of time immensely remote.In the sixth chapter I enumerated the chief objections which might be justly urged against the views maintained in this volume. One, namely the distinctness of specific forms, and their not being blended together by innumerable transitional links, is a very obvious difficulty.Eldredge and Gould certainly would agree that some very important gaps really are due to imperfections in the fossil record. For example the Cambrian strata of rocks, vintage about 600 million years, are the oldest ones in which we find most of the major invertebrate groups.And we find many of them already in an advanced state of evolution, the very first time they appear.Before we come to the sort of sudden bursts that they [Eldredge and Gould] had in mind, there are some conceivable meanings of `sudden bursts' that they most definitely did not have in mind.These must be cleared out of the way because they have been the subject of serious misunderstandings.This document lists the same quotations, but includes the surrounding context (usually just the paragraph in which Patton's quotation occurs).I do not know when this collection was assembled, but it appears to be around 1994, judging by the date of the most recent source.— Richard Dawkins, Until recently, vertebrates have been known from rocks no older than the Middle Ordovician (about 450 million years ago) (1, 2).In 19 the known range of the vertebrates was extended back about 20 million years by discoveries of fish fossils in rocks of latest Early Ordovician and earliest Middle Ordovician age in Spitzbergen (3, 4) and Australia (5).