let's look on the meaning of the word spontaneous- (from Oxford dictionary)-
adjective
performed or occurring as a result of a sudden impulse or inclination and without premeditation or external stimulus.
and now the meaning of technology -
noun (plural technologies)
[mass noun]
the application of scientific knowledge for practical purposes, especially in industry.
From those definitions I conclud that the word "spontaneous" is not the right word, becuse to "do" technology we need to plan, to use some kowledge and spontaneous is work from the instinct.
Therefore I call those technolgy- Improvised technolgy.
How can we identify improvised technolgy?
1. Specific need (utilities- Utilitas)
2. Imported material or object-Due a lack of resources or time (stability- firmitas)
3. Damage to the wholeness- damage the wholeness of the central object's shape (beauty- Venustas)
Examples-
Thatch- *need- shelter from the rain.* Material- stone from the sidewalk, ropes, sticks and nylon.
Hot fish- *need-home to the fish. * material-kettle, fish, stones.
Follow the flow-*need- adjust the flow * material-leaf.
Opuntia ficus-indica-*need- prevent climbing over the wall * material- fragments of glass bottle , concrete.