Giant horsetail fossils from the past to the present once again violates “Cope’s Law” and evolutionary theory. This shows change over time, and that change in only ever degenerative. ~Chris L Lesley
“The giant horsetail fossils are considerably larger than the modern forms. Modern horsetail seldom exceeds one meter in height and one centimeter in diameter. I have initially misidentified giant horsetails as lycopods because of their size, about 10 cm (4 in) in diameter. Calamites probably reach 20 m (66 ft) in height in the fossil record. The longest calamite log I have seen at Joggins was less than 4 m (13 ft). Figure 2 shows a typical fossil calamite beside its modern counterpart.
Modern club moss reaches a maximum of 50 cm (1.6 ft) in
height, but their fossil counterpart, the lycopods, had trunks that were many meters tall and reached diameters up to one meter! Figure 3 shows a polystrate lycopod from the Joggins Formation. It has a trunk diameter of roughly 75 cm (2.5 ft) and was at least 7.5 m (24.6 ft) tall.
NOTE: (These estimates are way too low) ~Chris L Lesley
“In addition to the polystrate calamites and lycopods, there are actual fossil trees at Joggins called cordaitales, a type of pine.”