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Does obsidian rock contain few or no mineral grains?
Obsidian is a type of volcanic glass that lacks a crystalline structure, so it does not contain mineral grains. It forms from quickly cooling lava rich in silica, resulting in a smooth, glassy texture without distinct mineral crystals.
Which mineral cannot split easily along a certain direction in the mineral?
Quartz is a mineral that cannot split easily along a certain direction because it lacks cleavage. Instead, quartz breaks in a conchoidal fracture, producing curved, shell-like surfaces.
Which kind of metamorphic rock is massive and has no banding?
Marble is a metamorphic rock that is massive and lacks banding. It forms from the recrystallization of limestone and is composed mostly of the mineral calcite. Marbles are often used in architecture and sculpture due to their aesthetic qualities.
Is granulite non foliated?
Yes, granulite is a non-foliated metamorphic rock characterized by a granular texture with interlocking mineral grains. It forms under high temperature and pressure conditions, typically in the deep crust or upper mantle, and lacks the alignment of minerals seen in foliated rocks like schist or gneiss.
What is amorphous sediment?
Amorphous sediment is sediment that lacks a defined crystalline structure. It can consist of disorganized mineral grains, organic matter, or other materials that do not exhibit a regular geometric arrangement. Examples include volcanic glass shards and organic debris in marine sediments.
Does obsidian rock contain few or no mineral grains?
Obsidian is a type of volcanic glass that lacks a crystalline structure, so it does not contain mineral grains. It forms from quickly cooling lava rich in silica, resulting in a smooth, glassy texture without distinct mineral crystals.
Which mineral cannot split easily along a certain direction in the mineral?
Quartz is a mineral that cannot split easily along a certain direction because it lacks cleavage. Instead, quartz breaks in a conchoidal fracture, producing curved, shell-like surfaces.
Which kind of metamorphic rock is massive and has no banding?
Marble is a metamorphic rock that is massive and lacks banding. It forms from the recrystallization of limestone and is composed mostly of the mineral calcite. Marbles are often used in architecture and sculpture due to their aesthetic qualities.
Is granulite non foliated?
Yes, granulite is a non-foliated metamorphic rock characterized by a granular texture with interlocking mineral grains. It forms under high temperature and pressure conditions, typically in the deep crust or upper mantle, and lacks the alignment of minerals seen in foliated rocks like schist or gneiss.
Is graphite non-foliated or foliated?
Graphite is a foliated metamorphic rock originating from Bituminous Coal.
Which rock is foliated shows mineral alignment but not banding and contains medium sized grains of quartz and pyroxene?
shist
Is coal not a mineral because it has a crystal structure?
No. Coal is not a mineral for two reasons: it lacks a crystal structure and it is organic.
If a mineral lacks planes along which it may cleave what will occur?
If a mineral lacks planes along which it may cleave, it will likely fracture instead of cleave. This means that the mineral will break irregularly and not along smooth, flat surfaces like in cleavage. The fracture pattern can vary depending on the mineral's physical properties.
What type of mineral lacks silicon and oxygen?
For example the mercury sulfide (HgS) - cinnabar.
What is lower mantles made of?
Peridotite:magnesium-rich mineral which is ultramafic because it lacks silica
A mineral that lacks silicon or oxygen is called?
A mineral that lacks silicon or oxygen is called native elements. These minerals consist of a single element or a combination of elements without silicon or oxygen in their chemical composition. Examples include gold, silver, copper, and sulfur.
What is amorphous sediment?
Amorphous sediment is sediment that lacks a defined crystalline structure. It can consist of disorganized mineral grains, organic matter, or other materials that do not exhibit a regular geometric arrangement. Examples include volcanic glass shards and organic debris in marine sediments.
