Without the specific table of rock characteristics provided, it is difficult to determine the exact context and characteristics of the rock layers mentioned. However, based on general knowledge of the rock cycle, ribbon layers are typically associated with metamorphic rocks.
Metamorphic rocks are formed when pre-existing rocks (igneous, sedimentary, or other metamorphic rocks) undergo changes in response to high heat, pressure, or chemical activity. These changes can cause minerals within the rock to reorganize and align, leading to the development of distinct layering or banding patterns.
The ribbon layers in metamorphic rocks often result from the process of foliation, which involves the alignment of minerals in parallel layers or bands. Foliation can occur due to intense pressure exerted on the rock during metamorphism, causing minerals to recrystallize and align in a preferred direction. This alignment gives the rock its characteristic ribbon-like appearance.
In contrast, sedimentary rocks are typically formed by the accumulation and lithification of sediments, while igneous rocks originate from the solidification of molten material (magma or lava). Although some sedimentary rocks may exhibit layering due to the deposition of sediments in different environments, the ribbon-like layering is less commonly associated with sedimentary rocks. Similarly, igneous rocks generally do not display ribbon layers, as their formation involves the rapid cooling and solidification of molten material.
Therefore, based on the information provided, if ribbon layers are mentioned, it is more likely that they are found in metamorphic rocks due to the process of foliation during metamorphism.