一提到沒有文字的記录,人們总会想到結繩記事,象形文字……等等。所有这些全是人类活动的历史写照,尤以后者已具有文字的雛形。在沒有人类活动,即人类出現以前,自然界已有很多种生物渡过了它們的一生,在长久的历史过程中,它們各自有它們的出現、繁盛、衰亡过程,它們的生存历史反映出当时的自然环境。古代生物的演化早在人类出現以前,所以我們人类是沒有經历过的。可巧的是,过去的一切并不是烟跡无存,如巨厚的石灰岩告訴我們过去是海洋所在地,薄层的砂岩或大小卵石結成的砾岩层,說明过去水流流經那里;今日开采的煤层与褐炭是往时的森林和沼 When it comes to records without text, people always come to mind, hieroglyphs ... and so on. All of this is a historical portrayal of human activity, especially the latter, which has the embryonic form of writing. In the absence of human activities, that is, before the advent of mankind, many kinds of creatures have lived through their lives in nature. In the course of their long history, they each had their own process of emergence, prosperity and decline, and their living history reflected that at the time Natural environment. The evolution of ancient creatures long before humans appeared, so we humans have not experienced. Coincidentally, everything in the past is not without smoke. Thick limestone tells us that in the past it was a conglomerate of thin layers of sandstone or pebbles, where past oceans flowed, and the seams that were mined today Brown charcoal is the last forest and marsh