Thank you for the particular info.
Yes, I can understand someone compiling what has been previously taught for centuries. That is important and difficult work. When one looks at the list of citations for the Catechism, found in the hard cover version, one can only be in awe.
While the CCC is a tremendous resource and is obviously the product of an incredible amount of work, not everything it contains is the historic teaching of the Catholic Church. Here is some quotes from
Response of the Pontifical Biblical Commission on Genesis – June 30, 1909
Question I: Whether the various exegetical systems which have been proposed to exclude the literal historical sense of the three first chapters of the Book of Genesis, and have been defended by the pretense of science, are sustained by a solid foundation? – Reply: In the negative.
Question II: Whether, when the nature and historical form of the Book of Genesis does not oppose, because of the peculiar connections of the three first chapters with each other and with the following chapters, because of the manifold testimony of the Old and New Testaments; because of the almost unanimous opinion of the Holy Fathers, and because of the traditional sense which, transmitted from the Israelite people, the Church always held, it can be taught that the three aforesaid chapters of Genesis do not contain the stories of events which really happened, that is, which correspond with objective reality and historical truth; but are either accounts celebrated in fable drawn from the mythologies and cosmogonies of ancient peoples and adapted by a holy writer to monotheistic doctrine, after expurgating any error of polytheism; or allegories and symbols, devoid of a basis of objective reality, set forth under the guise of history to inculcate religious and philosophical truths; or, finally, legends, historical in part and fictitious in part, composed freely for the instruction and edification of souls? – Reply: In the negative to both parts.
Question III: Whether in particular the literal and historical sense can be called into question, where it is a matter of facts related in the same chapters, which pertain to the foundation of the Christian religion; for example, among others, the creation of all things wrought by God in the beginning of time; the special creation of man; the formation of the first woman from the first man; the oneness of the human race; the original happiness of our first parents in the state of justice, integrity, and immortality; the command given to man by God to prove his obedience; the transgression of the divine command through the devil’s persuasion under the guise of a serpent; the casting of our first parents out of that first state of innocence; and also the promise of a future restorer? – Reply: In the negative.
In each case the Pontifical Biblical Commission ruled in favor of the literal reading of Genesis. There is much more to the document which can be found
here.