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  1. Ohio Geology Interactive Map - Ohio Department of Natural …

    It provides desktop and mobile users a way to create custom geologic maps of their areas of interest. It also serves as a way to view and interact with geologic GIS data prior to …

  2. What Are Rock Strata and How Do They Form? - Biology Insights

    Aug 4, 2025 · Rock strata, also known as beds or layers, are visually identifiable bands of rock that often vary in color, texture, and composition. These layers can be horizontal or tilted, and …

  3. Fossils, Rocks, and Time: Rocks and Layers - USGS Publications …

    Rock layers are also called strata (the plural form of the Latin word stratum), and stratigraphy is the science of strata. Stratigraphy deals with all the characteristics of layered rocks; it includes …

  4. Rock Layers - U.S. National Park Service

    Dec 3, 2024 · All rock layers have a pre-rock environment. For example, some layers of rock are made of sand from ancient dunes (an example of sedimentary rock). Other layers were once …

  5. Rock layers and relative dating — Science Learning Hub

    Geologists are able to ‘read’ the rock layers using relative and absolute dating techniques. Relative dating arranges geological events – and the rocks they leave behind – in a sequence. …

  6. Geological Layers - Definitions & FAQs | Atlas

    Geological layers, also known as strata, are distinct layers of sediment or rock deposits that are arranged in chronological order within the Earth's crust. These layers form through processes …

  7. Fossils and rock layers (article) | Khan Academy

    Review your understanding of fossils and rock layers with this free article aligned to NGSS standards. Sedimentary rocks typically occur in horizontal layers called strata. In undisturbed …

  8. Stratigraphic Nomenclature | GeoKansas

    To identify layers of rock, geologists have created several categories, the most common of which are formations, groups, and members.

  9. Layers of Rocks – Science for Kids

    Did you know that there are different types of layers of rocks? Well there are actually three, and here we’ll take you through what these rocks are, how they are made and much more.

  10. What are the different types of rock layers? - CK-12 Foundation

    There are three main types of rock layers: Igneous rocks: These are formed from the cooling and solidification of molten material called magma or lava. Examples include granite and basalt.