Evidence includes soil samples, floral and faunal samples and the collection of all objects. Pottery is very important. You have learned that pottery changes over time. Changes in pottery, like coins can also be used to set a latest possible date for a particular level of an excavation. All of this evidence has to be carefully collected and organized.
Some people spend each afternoon, after long hours in the sun, working with pottery.
Important sherds are registered in a data bank and photographed. Some are drawn by a staff artist. You can clearly see the different layers of soil and debris. At the very bottom is a plaster floor to a room. The floor was covered by a half meter of building debris, stone and plaster.