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What do sandstone shale and siltstone have in common?
They are all clastic sedmimentary rocks formed mainly of silicate minerals.
Can you scratch shale with your fingernails?
No, you generally cannot scratch shale with your fingernails. Shale is a sedimentary rock that is relatively hard and composed of clay minerals, making it more resistant to scratching. Fingernails have a hardness of about 2.5 on the Mohs scale, while shale typically has a hardness of around 3 to 4. Therefore, a fingernail would not be able to leave a scratch on shale.
What are the 3 different types of cement that bind sand together in Sandstone?
Silica also called quartz cement, Calcite Cement, Iron Oxides also called hematite cement that bind sand together in sandstone. Sandstone also has other cementing agents that occur in less common forms. These cementing agents include pyrite, barite and gypsum.
What is lithified clay?
Shale.
Is shale considered an organic rock?
No i believe that Shale is considered a Clastic rock because it is made up of small pieces of other broken rocks.
During the intrusion of the Palisades Sill contact metamorphism changed sandstone and shale into what?
During the intrusion of the Palisades Sill, contact metamorphism changed sandstone and shale into quartzite and hornfels. Quartzite forms from the recrystallization of quartz sandstone, while hornfels forms from the alteration of shale due to high temperatures and pressures near the igneous intrusion.
What are examples of rocks that are easily weathered and rocks re resistant to weathering?
Examples of rocks that are easily weathered include limestone, sandstone, and shale, which are sedimentary rocks. Rocks that are resistant to weathering include granite, basalt, and quartzite, which are igneous and metamorphic rocks that have a more crystalline structure and are less prone to chemical breakdown from weathering processes.
What are rocks that are resistant to erosion called?
Cap rock. Resistant cap rock will help protect softer rock below it from erosion. Any rock type that is more resistant to erosion than the rock type below it is called a cap rock. For instance, it could be basalt (igneous) overlying limestone (sedimentary), or limestone (sedimentary) over shale (also sedimentary).
What geologic processes transform sandstone into quartzite quartzite into magma and magma into rhyolite?
compacting and cementaing heat and pressure melting
What is the protolith of a quartzite?
The protolith of a quartzite is a sedimentary rock called sandstone. Quartzite forms when sandstone undergoes metamorphism, typically due to high heat and pressure, causing the quartz grains in the sandstone to recrystallize and merge together.
Is shale resistant to erosion?
Shale is generally more resistant to erosion compared to other rock types like sandstone due to its fine-grained nature and ability to compact tightly. However, shale can still erode over time through processes such as weathering, rainfall, and freeze-thaw cycles.
What examples of rocks are easily weathered and rocks that are resistant to weathering?
limestone,sandstone,and shale
Why have the Appalachian mountains eroded more than the rocky?
The Appalachian mountains are older and composed of softer rocks, like sandstone and shale, which are more susceptible to erosion compared to the rocky mountains, which are younger and made of harder, more resistant rocks like granite and quartzite. Additionally, the Appalachian region receives more precipitation, which accelerates the erosion process.
Can sandstone become shale?
Yes, sandstone can become shale through a process called lithification, where sediment undergoes compaction and cementation. However, it is more common for sandstone to transform into a different type of rock, such as quartzite, when subjected to higher temperatures and pressures. Shale typically forms from the compaction of finer sediments like silt and clay. Therefore, while there's a geological connection between these sedimentary rocks, sandstone does not directly become shale.
What is stronger shale or sandstone?
It depends on how you are defining the word 'soft'. Quartzite is the hardest and most durable of the three - no question there. Shale can be crumbled with the tap of a hammer. Some loosely cemented sandstone can be crumbled when squeezed hard enough with your hand and some is well cemented and quite hard.
Name four kinds of metamorphic rock?
Four kinds of metamorphic rock include schist, gneiss, marble, and quartzite. Schist is characterized by its layered texture and is often formed from shale. Gneiss typically exhibits banding and is derived from granite or volcanic rock. Marble forms from limestone and is known for its use in sculptures and architecture, while quartzite originates from sandstone and is highly resistant to weathering.
What are examples of igneous metamorphic and sedimentary rocks?
Igneous: * Obsidian * Granite * Diorite * Gabbro * Pumice * Basalt Metamorphic: * Slate * Phyllite * Gneiss * Mica schist * Marble * Quartzite * Granulite Sedimentary: * Limestone * Sandstone * Shale * Chert * Mudstone * Chalk
