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.
What the Test Does. Ultrasounds use sound waves to create images of your baby in the womb. With a transvaginal ultrasound, a technician inserts a small probe into your vagina to get a clearer image of your tiny baby. Transvaginal ultrasounds check your baby's heartbeat and the placenta.They can rule out problems, such as ectopic pregnancies. They also show problems with the cervix -- such as short cervix -- that raise your risk of early labor.ltrasounds use sound waves to create images of your baby in the womb. With a transvaginal ultrasound, a technician inserts a small probe into your vagina to get a clearer image of your tiny baby. Transvaginal ultrasounds check your baby's heartbeat and the placenta.