I would say that William Blake directs the poem's praise to the gentleness of nature. The book where all these poems are written is called Songs of Innocence, so it is obvious what he is talking about.
I would say that plate tectonics shows what the origin of volcanic activity, earthquakes and mountains comes from their collision or subduction. Where two plates collide mountains can be formed (uplift), where subduction occurs then volcanic activity like in the circum-pacific belt occurs and where stresses build up in subduction or transform fault (like the San Andreas Fault) and are suddenly released, earthquakes are the result. Subduction is where the oceanic plate gets pushed under the continental plate.
Would you mind showing the passage so I may identify the traits?
