英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Coquina - Wikipedia
    Coquina is composed mainly of the mineral calcite, often including some phosphate, in the form of seashells or coral Coquinas dating from the Devonian period through to the much more recent Pleistocene epoch are a common find all over the world, with the depositional requirements to form a coquina being a common thing in many marine facies
  • Coquina: Limestone composed almost entirely of fossil debris
    Coquina is an extremely porous limestone composed almost entirely of sand-sized shell fragments (usually mollusks or gastropods) that have been transported by waves and currents
  • Coquina - The Rock that Saved St Augustine - Castillo de San Marcos . . .
    This material "glued" the shell fragments together into a porous type of limestone we now call coquina, which is Spanish for "tiny shell" Although found in very few places in the world, conditions were just right for coquina formation along the east coast of Florida
  • Coquina: Identification, Pictures Info for Rockhounds
    Coquina is a clastic sedimentary rock made almost entirely out of large (2 mm or larger) shell fragments The shell fragments are cemented together by calcite, and it is technically a variety of limestone Coquina forms almost exclusively in high-energy marine environments like beaches and tidal channels
  • Coquina | Sedimentary Rock, Shells Fossils | Britannica
    Coquina, limestone formed almost entirely of sorted and cemented fossil debris, most commonly coarse shells and shell fragments Microcoquinas are similar sedimentary rocks that are composed of finer material
  • What are coquina and tabby? - NOAAs National Ocean Service
    Coquina is a rare form of limestone composed of the shell fragments of ancient mollusks and other marine invertebrates, which, over time, are glued together by dissolved calcium carbonate in the shells
  • Coquina Composition and Formation | Sedimentary Rock
    Coquina is a type of sedimentary rock that is primarily composed of fragmented shell debris The shells that make up coquina can come from a variety of marine animals, such as clams, snails, and other shellfish
  • Weekly What is it?: Coquina Rock - UF IFAS Extension Escambia County
    The fort is made completely of coquina rock, which is naturally resistant to the salt spray and tough outdoor conditions that any coastal building must endure The relatively soft exterior of shell was effective in fortresses, because it absorbed cannon fire instead of cracking the walls
  • Coquina: A Rock Made of Shell Fragments - Sandatlas
    Coquina is one of the few sedimentary rocks that record not only the chemical processes of limestone formation but also the physical energy of coastal environments Its open, shell-rich structure makes it both geologically distinctive and visually striking
  • Geology of the Coquina Rocks - Florida State Parks
    Coquina rock is a type of sedimentary rock (specifically limestone), formed by the deposition and subsequent cementation of mineral or organic particles on the floor of oceans or other bodies of water at the Earth's surface





中文字典-英文字典  2005-2009