It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
Syncline In structural geology, a syncline is a fold with younger layers closer to the center of the structure. A synclinorium is a large syncline with superimposed smaller folds. Synclines are typically a downward fold, termed a synformal syncline; but synclines that point upwards, or perched, can be found when strata have been overturned and folded.