Centered headers, below, are his categories; the rest are mine. Changes in atmospheric partial pressures of carbon dioxide produce corresponding changes in carbon dioxide solubility. Sloss, [T]his quote only demonstrates that, sometimes, under the right conditions, limestones can form by inorganic processes.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.This is a collection of quotations from Don Patton on the subject of evolution.The original collection of quotations can be found at [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).
One good reason might be that many of these animals had only soft parts to their bodies: no shells or bones to fossilize.
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.
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.