Here is a list of 10 factors that can temporarily cause significant deviations in your blood pressure measurements. 1  Blood Pressure Cuff is too Small1,3,4 - It is extremely important to make sure the proper size blood pressure cuff is used on your upper arm when taking a measurement.
Mid-ocean ridges are geologically active, with new magma constantly emerging onto the ocean floor and into the crust at and near rifts along the ridge axes.The crystallized magma forms new crust of basalt (known as MORB for mid-ocean ridge basalt) and gabbro.ceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. There are two processes, ridge-push and slab pull, thought to be responsible for the spreading seen at mid-ocean ridges, and there is some uncertainty as to which is dominant.
The sea floor spreads apart at divergent boundaries. In the ocean, divergent boundaries are also called spreading centers.Mid-ocean ridges mark these sites where the ocean floor is spreadingapart. As the ridges continue to widen, a gap called a forms. Here molten material rises to build new crust.he records are the same on either side of the ridge.As scientists continued to map the ocean floor, they found morerecords of these reversals. By dating the rock, scientists had furtherevidence of plate movement. The youngest rock records the mostrecent reversal, which happened only about 760,000 years ago.