Concurrent range zone and partial range zone (ISG, Figure b and c): The interval between the documented lowest occurrence of one taxon and the documented highest occurrence of another taxon. Concurrent range zone is used when the fossil occurrence results in stratigraphic overlap of the taxa (Figure b).When such occurrences do not result in stratigraphic overlap, the interval zone may be called a partial range zone (Figure c).3. The zone, or biozone, is the fundamental unit of biostratigraphic classification. A zone may be divided into subzones and/or grouped into superzones. Each biozone is given a unique name, which is compound and designates the kind of biozone.
Other common causes of shortness of breath were considered, including: Bacterial pneumonia: However, his lungs were clear with no consolidation on X ray, and the duration of his symptoms (2 months) was not consistent with the presentation of a typical bacterial pneumonia.
The stomach âbugâ is usually a sickness caused by a virus which spreads from person to person or through food contamination. Symptoms usually appear 1 to 2 days after exposure. Symptoms are often mild and usually only last a day or two. You may experience some of the following symptoms: 1  Upset Stomach. 2  Diarrhea. 3  Vomiting. 4  Fever. 5  Headache. 6  Abdominal cramps.