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A framestone is a special type of
The term "framestone" was not used in the original Dunham classification by Dunham (1962).
It first appeared in the modified Dunham classification by Embry and Klovan (1971) where it is described as an autochthonous limestone having "in situ massive fossils which constructed a rigid three-dimensional framework during deposition. The in situ fossils therefore form the supporting framework of the rock, with matrix material occurring in the interstices between the fossils."
Lokier and Al Junaibi(2016) define a framestone as "an autochthonous carbonate-dominated rock supported by a rigid organic framework developed at the time of deposition."
{{cite journal , last1=Wright , first1=V.P., year=1992 , title=A revised Classification of Limestones , journal=Sedimentary Geology , volume= 76 , pages=177–185 , doi=10.1016/0037-0738(92)90082-3
Limestone
carbonate rock
Carbonate rocks are a class of sedimentary rocks composed primarily of carbonate minerals. The two major types are limestone, which is composed of calcite or aragonite (different crystal forms of CaCO3), and dolomite rock (also known as dolosto ...
in the Dunham classification
The Dunham classification system for carbonate sedimentary rocks was originally devised by Robert J. Dunham in 1962, and subsequently modified by Embry and Klovan in 1971 to include coarse-grained limestones and sediments that had been organical ...
.
Description
The term "framestone" was not used in the original Dunham classification by Dunham (1962).
It first appeared in the modified Dunham classification by Embry and Klovan (1971) where it is described as an autochthonous limestone having "in situ massive fossils which constructed a rigid three-dimensional framework during deposition. The in situ fossils therefore form the supporting framework of the rock, with matrix material occurring in the interstices between the fossils."
Lokier and Al Junaibi(2016) define a framestone as "an autochthonous carbonate-dominated rock supported by a rigid organic framework developed at the time of deposition."
Interpretive problems
One possible problem in the interpretation of framestones is that the framework can be of different sizes from millimeters to meters, so they might not be present on the thin section. Some organisms can also be binding and build frames, so they might producebindstone Bindstone is a special type of carbonate rock in the Dunham classification. The term did not appear in the original Dunham classification from 1962 and was introduced by Embry and Klovan 1971 in the modified Dunham classification.
Description
Em ...
s/ boundstones and framestones. In some cases it might also be hard to decide whether a fossil was rigid or not during deposition.
References