Page "Economy of Seychelles" Paragraph 34

# Hydrocarbon generation and migration with the presence of: a ) numerous DHIs on seismic, including gas chimneys, flat spots, bright spots, phase changes and chemosynthetic reefs ; b ) gas sniffer anomalies, involving ethane / iso-butane in the southeast and propane / normal butane / total hydrocarbon in the north and northeast ; c ) UV fluorescence anomalies, especially over the wells and in the southeast ; and d ) 4 types of beach-stranded tar that correlate to the local source rock stratigraphy.