Bamboo Stone (tentaculitoid) Ancient invertebrates. Extinct genus of a class of marine mollusks. Slender conical shell, the shell length is only one millimeter to a centimeter or so, some species of shell table cloth, such as longitudinal ribs are horizontal ring. Life in the Ordovician, Silurian and Devonian. Is a division and correlation of Devonian strata in one of the important fossils. Stone named because of the shape of bamboo. Produced in Songshan, Shijiahe area. The stone is gray rocks, the deep green. Wong bamboo stone formation in the underground, independent forming and scattered, there is no fixed rocks, so difficult to adopt. The stone is generally two, oval-shaped cross-section, two or more seldom. No man-made stone bamboo processing, cleaning surface dust can only view the surface. Qing Xu bamboo stone gives a sense of quiet, "troubled veteran section, elegant gentleman wind", used to evaluate and praise bamboo stone is very appropriate. Programme is divided into thick bamboo stone shell of the bamboo stone projects and other aspects of shell-type embryo sections stone beads stone projects and objectives. Bamboo shell type, among which some species of Devonian strata can be divided into more than 20 bamboo rocks, each with a large area can be used for intercontinental or comparative, Devonian biostratigraphy in the play important role.
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No. 2
Bamboo Stone (tentaculitoid) Ancient invertebrates. Extinct genus of a class of marine mollusks. Slender conical shell, the shell length is only one millimeter to a centimeter or so, some species of shell table cloth, such as longitudinal ribs are horizontal ring. Life in the Ordovician, Silurian and Devonian. Is a division and correlation of Devonian strata in one of the important fossils. Now seen all the bamboo is a fossil shell stone. Stone named because of the shape of bamboo. Produced in Songshan, Shijiahe area. The stone is gray rocks, the deep green. Wong bamboo stone formation in the underground, independent forming and scattered, there is no fixed rocks, so difficult to adopt. The stone is generally two, oval-shaped cross-section, two or more seldom. No man-made stone bamboo processing, cleaning surface dust can only view the surface. Qing Xu bamboo stone gives a sense of quiet, "troubled veteran section, elegant gentleman wind", used to evaluate and praise bamboo stone is very appropriate. Shell composed of calcium carbonate, mostly straight slender tapered shell and tube, cone or ring a few were bent, the length ranging from 1 ~ 80 mm, usually more than the length of less than 10 mm. Shell is divided into three parts, namely initial room, before the Department and the mouth. Conical shell at the beginning of the vertex room, showing drops of cone or cone-shaped. Before the beginning of the Housing Department and the phase, and gradually expand. Mouth parts in a wide cone-shaped shell. Bamboo stone shell wall thick shell and thin shell is divided into two types of type. Thick shell bamboo stone speculate in their lives enriched in time to inhabit shallow coastal waters and more turbulent waters; lived in the Ordovician to Devonian. Bamboo stone shell-type distribution in the far shore and deeper waters, it is appropriate oxygen and calm environment, usually considered to be business planktonic lifestyle. Survive in the Devonian. Bamboo stone shell surface smooth, without any ornaments, but usually with different types of decoration, such as growth lines on the vertical line, longitudinal groove, longitudinal ribs, transverse groove, cross-ring and stabbed the tumor (Figure 1), etc. These different types of decorative forms, distribution and composition of each other, the identification of genera and species of bamboo stone an important symbol. Stone within the shell in a number of bamboo with horizontal divisions often separated into a number of shells ranging from the Ministry before the gas chamber. Because bamboo is already extinct creatures stone, and its software is not preserved, so the system on the taxonomic status of bamboo stone there had been many different speculations, such as bamboo stone was attributed to echinoderms, trilobites, a hole worms, pteropods, brachiopods, worms, a category or class is an organ of these animals. Now usually based on the shell wall structure of bamboo and stone composition and shell shape, use it as a key link in the Mollusca, the bamboo stone Programme (Ten-taculitoidea). Type of bamboo shell stone, especially stone beads embryo purpose of section elements, the rapid evolution in the Devonian, more variety, are abundant and widely distributed. According to some species of Devonian strata can be divided into more than 20 bamboo rocks, each with a large area can be used for intercontinental or contrast, in the Devonian biostratigraphy plays an important role.
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Wikipedia Daquan
zhujieshi Bamboo stone tentaculitoid A class of extinct marine invertebrates living in the Ordovician, Silurian and Devonian. Now seen all the bamboo is a fossil shell stone. Bamboo stone composed of shells of calcium carbonate, usually slender straight conical shell and tube, cone or ring a few were bent, the length ranging from 1 ~ 80 mm, length usually less than 10 mm. Shell is divided into three parts, namely initial room, before the Department and the mouth. Conical shell at the beginning of the vertex room, showing drops of cone or cone-shaped. Before the beginning of the Housing Department and the phase, and gradually expand. Mouth parts in a wide cone-shaped shell. The shell wall thickness of thin bamboo mixed stone, and can be divided into thick shell and thin shell type of two types. Thick shell bamboo stone speculate inhabit in their lives enriched and more volatile coastal shallow waters; shell-type bamboo stone located in deep waters far from shore and be appropriate to hypoxia and calm environment, usually planktonic life that is business. Bamboo stone shell surface smooth, without any ornaments, but usually with different types of decoration, such as growth lines on the vertical line, longitudinal groove, longitudinal ribs, transverse groove, cross-ring and thorns, tumors, etc. (Figure 1 bamboo stone structure to indicate). These different types of decorative forms, distribution and composition of each other, the identification of genera and species of bamboo stone an important symbol. Stone within the shell in a number of bamboo with horizontal divisions often separated into a number of shells ranging from the Ministry before the gas chamber. Because bamboo is already extinct creatures stone, and its software is not preserved, so the system on the taxonomic status of bamboo stone there had been many different speculations, such as bamboo stone was attributed to echinoderms, trilobites, a hole worms, pteropods, brachiopods, worms, a category or class is an organ of these animals. Now usually based on the shell wall structure of bamboo and stone composition and shell shape, use it as a key link in the Mollusca, the bamboo stone Programme (Tentaculitoidea). Type of bamboo shell stone, especially stone beads embryo purpose of section elements, the rapid evolution in the Devonian, more variety, are abundant and widely distributed. According to some species of Devonian strata can be divided into more than 20 bamboo rocks, each with a large area can be used for intercontinental or comparative, so Devonian biostratigraphy plays an important role. (Ruan Yiping)