Total annual layer (summer + winter) thickness for 36 varves is plotted on the graph to the right. A data file and the lines posted on the image were all created by a computer program designed to sequentially measure varve sequences.
Blockage of the bile ducts may cause symptoms such as abdominal pain, nausea and vomiting. If the bile duct remains blocked bile is unable to drain properly, jaundice (yellow discoloration of the eyes and skin) can develop and an infection known as cholangitis may also occur.ccasionally the gallstones can also block the flow of digestive enzymes from the pancreas because both the bile ducts and pancreas ducts drain through the same small opening (called the Ampulla of Vater) which is held tight by a small circular muscle (called the Sphincter of Oddi).
Gallstones may mean nothing and many people live their entire lives with them. Even though they may be harmless, gallstones do indicate a defect in the system. Often that defect can lead to more serious problems such as an acute gallbladder attack or blockage of the main bile duct. One or two stones may move up into the duct that connects the gallbladder with the main bile duct, the cystic duct. In some cases, these stones make their way out of the body.