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).
When a gallstone travels through or obstructs a bile duct it can cause biliary colic, with severe pain. The pain is located in the upper right quadrant of the abdomen and radiates as far as the scapula. morphine is usually not given to relieve the pain because it increases spasm of the biliary sphincters.he cause is unknown, although there is evidence of a connection between gallstones and obesity; an excess of cholesterol in the bile appears to be of major importance. Gallstones are most common in women after pregnancy, and in both men and women past age 35. They may be present for years without causing trouble.