Classification of Sedimentary Rocks (Part 1). Sedimentary rocks are classified based on their texture and composition. Detrital sediment has a clastic (broken) texture. Chemical and organic sediments have a non-clastic texture, and are classified based solely on their composition.
Galvanometer vs Ammeter. Ammeter and galvanometer are two devices that are used in the field of electronic and electrical measurements. Galvanometer is a very important device that is used to develop other measuring devices. It is also used to measure electrical currents. Ammeter is also a device that is used to measure electrical current.
My comment is mostly to the traditional analog ammeter where the current produces a magnetic field that is used to move an analog needle for measurement. Thus, such analog meters always need a current and the shunt resistance is the method of providing a current path for measuring voltage (note, meter scale is modified to reflect voltage).