Page "Geology of Venus" Paragraph 34

Volcanoes less than in diameter are very abundant on Venus and they may number hundreds of thousands or even millions.

Many appear as flattened domes or ' pancakes ', thought to be formed in a similar way to shield volcanoes on Earth.

These pancake dome volcanoes are up to in diameter and less than in height.

It is common to find groups of hundreds of these volcanoes in areas called shield fields.