![]() The two can also be differentiated by their appearance in sunlight. In contrast to this, slate requires slightly more pressure to be broken and gives you thin, flat pieces. Shale can be broken easily and shows little resistance crumbling into pieces. This is mainly due to its composition of mud. Shale however will give you a thumping sound. For example if you use a hammer to tap each stone, slate gives you a slightly more metallic sound when it is hit. You can find these out by various tests or experiments whereby the different behaviour of the two will help you differentiate between them. The foliation is not always corresponding to the sedimentary layering but is usually in planes that are perpendicular to the direction of metamorphic compression.Īpart from their slightly difference appearances, there are other features that are different in two. Slates are the finest of the grained foliated metamorphic rock. This is the reason it is often confused with shale. It is derived from the original shale type rock that is composed of volcanic ash or clay through a process known as low grade regional metamorphism. On the other hand, slate, which is also a fine grained rock, is foliated and homogenous metamorphic. Other mud stones similar to shale lack this feature. This characterization of shale is referred to as its fissility. A typical shale has many breaks along thin laminae or bedding or parallel layering which is about one centimetre in thickness. The ratio, however, of clay to other minerals is very variable. ![]() This mud is actually a mixture of clay mineral flakes as well as tiny fragments or silt sized particles of other minerals that include calcite, quartz etc. Shale refers to a fine grained rock or a clastic sedimentary rock that is majorly composed of mud. As we will now shed light on their differences, it will become quite clear that they have many dissimilarities. ![]() Many people confuse them as one but that is not true. Two rocks that are quite similar are shale and slate. They may appear to be perfect copies but have differences at the atomic or molecular level. When we talk about rocks, there are literally thousands of them and some are very similar to the others but not exactly the same. A simple way to explain this would be to take the example of gold its reserves are finite and it has a very high demand hence it is quite expensive. This basically depends on the quantity of these rocks or minerals that are available and whether they have a high demand or a low demand. In addition to these, some are very valuable whereas others have lesser value. Some are commonly found in a lot of places whereas others are specific to some regions. There are many different types of rocks and minerals found in the world. ![]()
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