id	keyword
geusb-4652	basin
geusb-4652	netherlands
geusb-4652	graben
geusb-4652	formation
geusb-4652	jurassic
geusb-4652	central
geusb-4652	marine
geusb-4652	dutch
geusb-4652	deposition
geusb-4652	north
geusb-4652	lower
geusb-4652	middle
geusb-4652	netherlands basin
geusb-4652	sea
geusb-4652	member
geusb-4652	callovian