Improperly canned or home-prepared foods are common sources of the toxin that can result in foodborne botulism. Wound botulism results from contamination of a wound with toxin-producing C botulinum. Foodborne botulism and wound botulism occur predominantly in adults and are the focus of this article.C botulinum is an anaerobic gram-positive rod that survives in soil and marine sediment by forming spores.mproperly canned or home-prepared foods are common sources of the toxin that can result in foodborne botulism. Wound botulism results from contamination of a wound with toxin-producing C botulinum. Foodborne botulism and wound botulism occur predominantly in adults and are the focus of this article.
Scientists can not find the exact age of fossils. They use radioactive measures estimates of sedimentation and index fossils to date other fossils. The closest scientists can come to an exact date for a fossil is Carbon 14 dating. However since Carbon 14 has a half life of about 5,600 years Carbon 14 dating can only be used to date very recent fossils.
Fossils themselves, and the sedimentary rocks they are found in, are very difficult to date directly. Instead, other methods are used to work out a fossilâs age. These include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and fossils of known ages.here are two main methods to date a fossil. These are: 1  absolute dating methods that tell us the actual age (in years) of an object. 2  There are many absolute dating methods. 3  Nearly all of these methods make use of radioactive elements that occur naturally in various types of minerals and organic matter.