Carboniferous

 Make an analogy between the layes of plant laid down to make the coal, over and over with the pleating continual pleating of the dna of a family which proudces 1026 sources, layeres in 10 generations, every 300 years.

-- the child in the age of innocence is a great intuitive ocean that dates back wherever you like in this case to the carboniferous  era, the Pennsylvania period when the steep slopes were sea shore and the swamp and the water buried the vegetation again and again in waves, 300 million years ago, that dried and was covered with and and again and again. The pages of a book they call it, the book of the black rock, and then it lay there horizontal in this zone until furfil changes heaved up the slopes and planted the hills that clapped their hands for joy.