Flu-like Illness. One of the earliest HIV symptoms in men is a severe 'flu-like' illness, known as the 'seroconversion illness.'. Seroconversion is the point in time where a person's blood is converted from being HIV negative to HIV positive, by the production of antibodies.
Erosion causes the surface of mountains to be younger than the rocks that form the mountains themselves. Glacial processes produce characteristic landforms, such as pyramidal peaks, knife-edge arÃªtes, and bowl-shaped cirques that can contain lakes.
Explain how tension can cause fault-block mountains to form. Tension results in a stretching of the crust. This stretching causes blocks of crust to drop down between the faults that form. The areas between the dropped down blocks form fault-block mountains. What are the possible causes of regional uplift? Warmer regions of the mantle heat the lithosphere and cause it to rise.