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If the sandstone is below the basalt layer, it is older. Though caution is advised, to make sure it is really a basalt layer and not an intrusion of gabbro. Other indicators that the sandstone is older is evidence of alteration to the sandstone where the two meet (called a "baked contact") and pieces of sandstone being found in the the basalt.
What else can I help you with?
How can you tell that the sandstone was not deposited on top of basalt layers?
The sandstone layer is older than the basalt. The older rock cannot be on top of the younger rock. The sandstone and the basalt (or basalt dike) are both deposited at the same depth.
How could you tell if a volcano makes felsite or basalt lava?
Thin lava
How can you tell that shale was not deposited on top of the basalt layer?
Shale typically forms in calm, water-rich environments, such as lakes or oceans, where fine particles settle slowly. In contrast, basalt is an igneous rock that forms from volcanic activity and generally indicates a more dynamic, high-energy environment. If shale were deposited on top of basalt, there would likely be signs of erosion or an unconformity, as well as a lack of sedimentary features in the shale that would suggest it was laid down in a different, more stable environment. Additionally, the mineral composition and grain size of the shale would differ significantly from that of the underlying basalt.
What famous statues are made from basalt?
The most famous statue made from basalt is the The Venus of Willendorf, a prehistoric figurine found in Austria. Another notable example is the Moai statues on Easter Island, which were carved from basaltic tuff.
How can you tell that granite and basalt are not pure substance?
Granite and basalt are not pure substances because they are composed of multiple minerals and varying chemical compositions. Granite typically contains quartz, feldspar, and mica, while basalt is primarily made up of plagioclase, pyroxene, and olivine. The presence of these different minerals indicates that they are mixtures rather than single, homogeneous substances. Additionally, their physical and chemical properties can vary depending on the proportions of these constituent minerals.
How can you tell that the sandstone was not deposited on top of basalt layers?
The sandstone layer is older than the basalt. The older rock cannot be on top of the younger rock. The sandstone and the basalt (or basalt dike) are both deposited at the same depth.
How can you tell that the sandstone was not deposited on top of the basalt?
The sandstone layer is older than the basalt. The older rock cannot be on top of the younger rock. The sandstone and the basalt (or basalt dike) are both deposited at the same depth.
How can you tell the difference between an intrusion and extrusion if there is a layer of sandstone on top?
An intrusion is formed when magma pushes into surrounding rock layers, creating intrusive features like veins or sills, which would be visible beneath the layer of sandstone. In contrast, an extrusion occurs when magma is ejected onto the surface as lava, forming extrusive features like lava flows or volcanic cones above the sandstone layer. The presence of different types of volcanic features would help distinguish between an intrusion and an extrusion in this scenario.
How could you tell if a volcano makes felsite or basalt lava?
Thin lava
How can you tell if a mesa or butte was formed by lava?
Mesas and buttes are formed by differential erosion where a tough layer of rock protects weaker ones below it. If the top layer of rock is a volcanic rock such as basalt, then it was formed as an indirect result of volcanic activity. The whole rock formation may not by volcanic, as lava may flow over sediment.
How can you tell that shale was not deposited on top of the basalt layer?
Shale typically forms in calm, water-rich environments, such as lakes or oceans, where fine particles settle slowly. In contrast, basalt is an igneous rock that forms from volcanic activity and generally indicates a more dynamic, high-energy environment. If shale were deposited on top of basalt, there would likely be signs of erosion or an unconformity, as well as a lack of sedimentary features in the shale that would suggest it was laid down in a different, more stable environment. Additionally, the mineral composition and grain size of the shale would differ significantly from that of the underlying basalt.
How can you tell which Basalt rocks has been in the river the longest?
when the rock is more rounded than the others
Could you tell me something about realative ages of rocks for a project please?
When you look at a rock that has undisturbed layers, the bottom layers are older and the upper layers are younger. Anytime a rock layer crosses another (ie. an intrusion), the crossing layer is younger.
Who is older in the Mario or luigi?
Mario. You can tell which is older.
What famous statues are made from basalt?
The most famous statue made from basalt is the The Venus of Willendorf, a prehistoric figurine found in Austria. Another notable example is the Moai statues on Easter Island, which were carved from basaltic tuff.
Why a cuticle is absent in piliferous layer?
because cuticle is waxy layer
How can scientists understand what the relevant age of a fossil is?
There are layers of earth that are deposited over time and based on where a fossil is in the layers a scientist can understand what the age of the fossil is relevant to another fossil in a different layer of earth. The law of superposition says that new sediment is deposited on top of old sediment so, the sediment in the bottom layer is the oldest and the sediment at the top is the youngest. Because of this the fossils in the bottom layer are the oldest and the fossils near the top are the youngest. Say you have 10 layers of rock, and the top layer is number 1 (the youngest) and the bottom layer is number 10 (the oldest). Even if a scientist can't tell exactly how old a fossil is if they know it is in a layer deeper than another fossil they know it is older than that fossil so, a fossil from layer 9 is older than a fossil from layer 5 which is also older than a fossil from layer 3. This is relative age. If we take it a step further... If a scientist knows that the fossil in layer 4 is 65 million years old than we not only know the fossils in layer 5-10 are older than the one in layer 4, but that they are all older than 65 million years old. So, the fossils in layer 1-3 would be less than 65 million years old. Scientists can know how old a specific fossil is sometimes based on whether or not it is an index fossil (a fossil that only occurred during a very small, specific interval of time), or if it is possible to carbon date it or something in the same layer.
