Texas Dow Employees Credit Union Routing Number, Address, Swift Codes. By State: 41 branches found. A routing number is a 9 digit code for identifying a financial institution for the purpose of routing of checks (cheques), fund transfers, direct deposits, e-payments, online payments, and other payments to the correct bank branch.
Specific to layered sedimentary rocks, geologists long ago determined that studying such layers -- what is called the âsuperpositionâ of the rocks -- is the key to tracking the Earthâs evolution, including the ebb and flow of oceans, lakes and rivers, and the shifting of sands and other forms of sediment.
1 Sedimentary rocks form when small grains of rock, mud and sand form layers and become compacted over a very long time. 2  Rock breaks into small grains through the process called weathering. 3  Sedimentary rock can be identified as it has visible layers. 4  Examples of sedimentary rock are shale, sandstone and limestone.