The Classical era Dark Age @1600-1,000 BC was caused by the eruption of Thera.
The Dark Ages that more people are familiar with was bracketed by the plague epidemic onsets of 536 and 1347. Numerous volcano eruptions and Earthquakes set the stage and preconditions for the initial outbreak of plague. You can go to the original hard copy sources or just use wikileaks but the pre-germ theories of these two Dark Ages have been disproven.
No, you're wrong.
You're referencing the middle ages.
The Dark Ages is now mostly called the early MIDDLE AGES. It was a period of time originally called "Dark" because there was not much written history, particularly in Europe and England, during that period of time. As Christianity spread, educated monks maintained ledgers, wrote letters, books, poems, music..and they shared knowledge in the communities that they established themselves in.
"The popular notion is that there was no science during this period and the period that followed or the High Middle Ages, while there was a resurgence of learning, this was theology and philosophy and not science as we know it today. This is a notion propagated by misinformedhistorians working from secondary sources. The truth is far different. The medieval period for all purposes
laid down the foundations of modern science. Much of these foundation lay on theidea of preserving knowledge through the written record via books.
And the spirit of invention never died even in the so called “Dark Ages”. Metallurgy reached a high point in theearly middle ages. Eyeglasses were invented soon after. The first mechanical clocks wereinvented in England. The Medievals also understood the principles of engineering staticsmagnificently demonstrated in the great Gothic cathedrals of Europe which still stand 800 yearsafter they were constructed."
There was nothing dark about the Dark Ages: The Medieval Origins of Science