SUBDUCTION ZONES and ISLAND ARCS. Subduction Zones are where cool lithospheric plates sink back into the mantle. It takes about 50 my for the ocean lithosphere that formed in the hot (>1000C) environment at mid-ocean ridges to cool to an equilibrium state and sink to its maximum depth below sea-level.
Ebola hemorrhagic fever is a viral disease caused by Ebola virus that results in nonspecific symptoms (see symptom section of this article) early in the disease and often causes internal and external hemorrhage (bleeding) as the disease progresses.
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.