176-186. Texture: Sedimentary rocks may have
clastic (detrital) or non-clastic texture
. Clastic sedimentary rocks are composed of grains, fragments of pre-existing rocks that have been packed together with spaces (pores) between grains. … Examples of clastic sedimentary rocks are sandstone and conglomerate.
What 3 textures are used to identify detrital sedimentary rock?
Modal size and sorting terms supplement the names of some categories. Rudite, arenite, and lutite are used in a compositional sense for detrital sediments whose texture is respectively indicated by the terms
gravel (conglomerate or breccia), sand (sandstone)
, and mud (mudstone, siltstone, or claystone).
What is the texture of a sedimentary rock?
Texture refers to
the physical makeup of rock
—namely, the size, shape, and arrangement (packing and orientation) of the discrete grains or particles of a sedimentary rock. Two main natural textural groupings exist for sedimentary rocks: clastic (or fragmental) and nonclastic (essentially crystalline).
Which textures are most common in a sedimentary rock?
| Name of Particle | Sand | Size Range | 1/16 – 2mm | Loose Sediment | Sand | Consolidated Rock | Sandstone |
|---|
What is the texture of clastic sedimentary rock?
Sedimentary Textures and Classification of Clastic Sedimentary Rocks. … Clastic texture:
grains or clasts do not interlock but rather are piled together and cemented
. Boundaries of individual grains may be another grain, cement or empty pore space. Overall rock is generally porous and not very dense.
What are the 5 examples of sedimentary rocks?
Examples include:
breccia, conglomerate, sandstone, siltstone, and shale
. Chemical sedimentary rocks form when dissolved materials preciptate from solution. Examples include: chert, some dolomites, flint, iron ore, limestones, and rock salt.
What are layers of sedimentary rock called?
Rock layers are also called
strata
(the plural form of the Latin word stratum), and stratigraphy is the science of strata.
What is the most common detrital sedimentary rock?
What minerals are most common in detrital sedimentary rocks? … The most abundant detrital minerals in sediments are
quartz and clays
. Quartz is an abundant mineral in many rocks. It resists cracking and mechanical weathering and is resistant to solution and decomposition from chemical weathering.
What is an example of a detrital sedimentary rock?
Detrital sedimentary rocks are formed from the solid particles or grains which are weathered and deposited.For example
Conglomerate , Sandstone
.
What factors can affect the texture of a sedimentary rock?
| Question Answer | What factors can affect the texture of a sedimentary rock? the size of the grains that make up the rock | What factors can affect the texture of an igneous rock? the length of time the magma had to cool |
|---|
What are the 4 properties of sedimentary rocks?
Four basic processes are involved in the formation of a clastic sedimentary rock:
weathering (erosion)caused
mainly by friction of waves, transportation where the sediment is carried along by a current, deposition and compaction where the sediment is squashed together to form a rock of this kind.
What colors are sedimentary rocks?
For the most part the colors of sediment and sedimentary rock fall within two spectra:
green-gray to red and olive-gray to black
(Figure C70).
Is chalk a sedimentary rock?
Chalk is a
fine-grained sedimentary rock
. It is usually pure white and quite soft and crumbly. It often contains rounded lumps of dark coloured flint.
Is marble a sedimentary rock?
The main difference between limestone and marble is that limestone is
a sedimentary rock
, typically composed of calcium carbonate fossils, and marble is a metamorphic rock. … Marble is usually light colored and is composed of crystals of calcite locked together like pieces of a jigsaw puzzle.
What is the texture of this metamorphic rock?
TEXTURES Textures of metamorphic rocks fall into two broad groups,
FOLIATED and NON-FOLIATED
. Foliation is produced in a rock by the parallel alignment of platy minerals (e.g., muscovite, biotite, chlorite), needle-like minerals (e.g., hornblende), or tabular minerals (e.g., feldspars).
