Barry we are not sure what you are referencing as incorrectly stated by Carter. His statement and your statement are almost the same. You both agree that Calcium carbonate is being formed today. The question is the environment it is forming in which correlates with the hypretherm environments discussed in chapter 7 & 8 of the Universal Model.
pages 265-266 – hyprethermal environment/process
pages 543-544 – examples of hyprethermal UM experiment creating rocks