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They could be surface imprints of wave depositions or they could be a cross bedding of windblown or water current sediments. A third alternative is that they could be some form of irregular weathering. It's hard to tell without seeing a particular specimen.

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15y ago

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Related Questions

Which type of rock is where fossils are found?

They are mostly found in Sedimentary Rocks


In what type of rocks could you find fossils?

Fossils are principally found in sedimentary rocks and also in some metamorphic rocks of sedimentary origin.


What type of rocks have fossils found in them?

Fossils are nearly always found in some type of sedimentary rock. Limestone is a sedimentary rock which very commonly contains fossils, as is coal.


Why are sedimentary rocks found everywhere on the earth?

They are not found everywhere, in some places metamorphic rocks are to be found and in other places igneous rocks are to be found.


Where are some fossils found?

Some fossils are found in the sedimentary rocks - along with shells and sediment.


Where can sedimentary rock be found in the UK?

Sedimentary rocks can be found anywhere rock particles, clay, and organic matter has deposited itself and lithified from overburden pressure or chemical precipitation from a saturated solution. Sedimentary rock covers 75% of the surface of the Earth's continents.


What parts of Canada largely contain sedimentary rocks and what minerals are found in them?

Canada's largest deposits of sedimentary rocks can be found in Alberta and Saskatchewan (the Great Plains area). Some of the minerals found inside of sedimentary rock include coal, oil, natural gas, and potash.


Is calcite metamorphic sedimentary or igneous?

Calcite is a mineral commonly found in sedimentary rocks. It can also be found in some metamorphic rocks, as it can recrystallize under heat and pressure. It is unlikely to be found in igneous rocks except in trace amounts.


What rocks are copper isolated from?

Copper is primarily isolated from copper ores such as chalcopyrite, bornite, and chalcocite. These ores are typically found in igneous and sedimentary rocks, as well as in hydrothermal veins. Copper can also be found in some metamorphic rocks.


What type of rock is nickel found in?

Nickel is predominantly found in igneous rocks, such as peridotite and basalt. It can also be found in some sedimentary rocks like certain iron ores.


What are some rocks that are not volcanic?

Sedimentary rocks: Metamorphic rocks


Does Obsidian help make up any sedimentary rocks?

It could most certainly be found in sedimentary rock in areas of past volcanism, and is, in fact, found in some limestones.