the ammonoid fossil was discovered in the jurassic limestone formation.
这块菊石化石是在侏罗纪石灰岩地层中发现的。
scientists identified a new ammonite species from the cretaceous period.
科学家们识别出一个来自白垩纪的新菊石物种。
the ammonoid shell exhibits a complex spiral morphology.
菊石壳呈现出复杂的螺旋形态。
ammonoids became extinct at the end of the permian period.
菊石在二叠纪末期灭绝了。
the museum acquired a rare ammonite specimen for its collection.
博物馆获得了一个稀有的菊石标本用于收藏。
researchers used ammonoid fossils as index fossils for dating rock layers.
研究人员使用菊石化石作为确定岩层年代的标准化石。
the spiral pattern of the ammonite shell has fascinated collectors for centuries.
菊石壳的螺旋图案几个世纪以来一直吸引着收藏家。
ammonoid evolution shows rapid diversification during the mesozoic era.
菊石的演化在中生代显示出快速的物种多样化。
the well-preserved ammonite fossil revealed intricate shell details.
保存完好的菊石化石展现了复杂的壳体细节。
geologists often find ammonoid remains in marine sedimentary rocks.
地质学家经常在海洋沉积岩中发现菊石遗骸。
the ammonite genus survived for over 300 million years in earth's oceans.
菊石属在地球海洋中存活了超过3亿年。
students study ammonoid morphology to understand ancient marine ecosystems.
学生们研究菊石形态以了解古代海洋生态系统。
the ammonoid fossil was discovered in the jurassic limestone formation.
这块菊石化石是在侏罗纪石灰岩地层中发现的。
scientists identified a new ammonite species from the cretaceous period.
科学家们识别出一个来自白垩纪的新菊石物种。
the ammonoid shell exhibits a complex spiral morphology.
菊石壳呈现出复杂的螺旋形态。
ammonoids became extinct at the end of the permian period.
菊石在二叠纪末期灭绝了。
the museum acquired a rare ammonite specimen for its collection.
博物馆获得了一个稀有的菊石标本用于收藏。
researchers used ammonoid fossils as index fossils for dating rock layers.
研究人员使用菊石化石作为确定岩层年代的标准化石。
the spiral pattern of the ammonite shell has fascinated collectors for centuries.
菊石壳的螺旋图案几个世纪以来一直吸引着收藏家。
ammonoid evolution shows rapid diversification during the mesozoic era.
菊石的演化在中生代显示出快速的物种多样化。
the well-preserved ammonite fossil revealed intricate shell details.
保存完好的菊石化石展现了复杂的壳体细节。
geologists often find ammonoid remains in marine sedimentary rocks.
地质学家经常在海洋沉积岩中发现菊石遗骸。
the ammonite genus survived for over 300 million years in earth's oceans.
菊石属在地球海洋中存活了超过3亿年。
students study ammonoid morphology to understand ancient marine ecosystems.
学生们研究菊石形态以了解古代海洋生态系统。
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