Highlight the relevance of Alexander von Humboldt as pioneer in the rock varnish research.
https://rpubs.com/Jose_Jordan/rock-varnish-review.
Rock varnish review document
24/11/2022
Aim
Alexander von Humboldt (1769-1859)
Humboldt was a polymath with important scientific and cultural contributions, inspiring naturalists like Charles Darwin and with an exceptional holistic vision
The rock varnish pioneer: von Humboldt
What is a rock varnish?
Rock varnish is a type of rock coating composed by clay minerals embebbed with Fe and Mn oxides and minor and trace elements
Rock varnish classification
Microbial communities
Microbial communities
Actinobacteria(Arthrobacter sp., Rubrobacter sp.)
Mn cycle, N fixationFirmicutes (Bacillus spp., Clostridium spp.)
C, S cycleα , β , γ - Proteobacteria (eg. Acinetobacter sp.)
Fe, Mn, N cycleChloroflexi/Cyanobacteria
C Fixation, N Fixation, Mn cycle -PSII-
Rock varnish as an astrobiological goal?
Rock varnish as an astrobiological goal?
Rock varnish as an astrobiological goal?
