* Quartz (SiO2): Extremely resistant to weathering and erosion, making it survive the transportation process and accumulate in sediment. Its hardness and chemical stability allow it to persist through multiple cycles of weathering.
* Feldspar (various aluminosilicates): While less resistant than quartz, feldspars are still relatively common in detrital rocks. They break down into clay minerals over time, but some feldspar grains remain intact.
* Clay Minerals (various hydrated aluminosilicates): These are formed from the weathering of other minerals, especially feldspar. They are very fine-grained and often make up a significant portion of mudstone, shale, and siltstone.
Other common minerals in detrital rocks:
* Micas (biotite, muscovite): These are sheet silicates that weather more readily than quartz but are still found in detrital rocks.
* Heavy minerals: These are denser than quartz and include minerals like zircon, garnet, and tourmaline. They are less common than quartz, feldspar, and clay minerals, but their presence can be helpful for understanding the source of the sediment.
It's important to note that the specific mineral composition of a detrital sedimentary rock will depend on the source rock, the climate, and the length of transport. For example, rocks derived from granitic sources will have more quartz and feldspar, while rocks derived from metamorphic sources might contain more micas.
