不在年輕2005.12.25 回答

丹霞地層DanThe main basis stratigraphy and the paleontology method division for generation， unit and so on discipline， world “ the world ”， 3 fossils （Fossil）， is the ancient organism‘s remains， the relic or loses the mark through physics， the chemical action causes them to turn hard like stone the primary form preserves until now。 Up to now the entire world boundary agreement recording had more than 250000 fossils biology species。 The ancient organism’s contour 印烙 on the rock， or the shell， the skeleton and so on by the silt， the mineral substance packing is changed the hard process calls 物理作用。 Solution and the ancient organism‘s and so on calcium carbonate， silicon dioxide， yellow iron ore matter carries on the chemistry replacement， causes the ancient organism maintenance original design to be called the chemical action。 4 ancient mainland， 5 real ferns fishing net headropes， real fern item， 6 duplicate leaves， 7 葉背， 8 in 250000000 year front two 迭 discipline Tethys， 9 loose cedars。 rosy cloud stratum