震旦角石

震旦角石-是一种距今四亿五千万年前的食肉动物化石，属软体动物门头足纲外壳亚纲婴鹉螺超目直角石科，生活在水动力相对较弱的正常浅海环境，它死记后埋藏于沉积物中，在一定的压力和温度下变成化石。这种动物早已灭绝，目前所见到的震旦角石化石赋存在中奥陶统泥质灰岩地层中，是研究有斑古海洋环境和划分地层时代的标准化石之一，此化石仅产于中国，保存较为完好的震旦角石化石产地唯独中国宜昌，由于岩层覆盖厚度大，出露极少，因而成为一种稀有珍贵化石，具有很高的收藏价值。此外，震旦角石化石还具有特殊的纹理，酷似剥皮的竹笋（又名宝塔石）。因此，它不仅是探索地球历史奥秘，了解生物进化的实物教材，又具有较高的观赏价值和艺术价值，集考古，收藏，观赏，艺术，礼品为一体，是地质学家，收藏家，艺术家和富贵家庭求之不得的珍品。
Rare Palaeontologic fossil-Orthoceras
Orthoceras is a palaeoanim that lived in week disturked neritic environment 400M.Y.ago,it belongs to Mollusca-Cephalopoda-Ectocochlia-Nautiloidea-Orhtocertidae.
Orthoceras fossils are hosted in middle Ordovician sysrem argillaceous limestone,that is one lf standard fossils which can be use in palaeo-marine environment and stratigraphic period study,This fossils are very rare because the overlying strata are very thick,so it"s a valuable collection for you.IN addition,the orthoceras fossils have aspecial lamination which like skinned bamboo shoots,So it"s also called pagoda stone.They have an attractive admire value and artistic valae,So they are rame fosils for geologist,collectistand artist