2. If you consider it as one mineral, feldspar is the most common mineral and quartz comes in second, especially when you consider the whole crust, continental plus oceanic crust. Feldspar is called a group of minerals only for the convenience of geologists.he most common mineral of the Earth's continentsâthe world we spend our time inâis quartz, the mineral SiO 2. Nearly all the sand in sandstone, in the deserts of the world and on its riverbeds and beaches is quartz.
Transabdominal Ultrasound. A transabdominal ultrasound is used to look at the pelvic organs. Gel is placed on your abdomen. Then a small, handheld unit called a transducer is gently moved around to view the pelvic organs. The transducer sound waves make a picture on the TV screen.
Endoscopic ultrasound (EUS) is a significant improvement over the standard (transabdominal) ultrasound.During standard transabdominal ultrasound the ultrasound probe is placed externally on the surface of the abdomen which limits the resolution of the images.ndoscopic ultrasound (EUS) is a significant improvement over the standard (transabdominal) ultrasound.