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flows and ash deposits Ash deposits result from more explosive activity and lava loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentssitereader034viewer20220520226036c36486bd0e6e1d692012html5thumbnails58jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=59Page 59button div class=ts-imageimg data-url=-1-0-what-a-volcano-is-and-how-it-is-formed-at-the-surface-it-erupts-to-formhtmlpage=59 data-page=59 class=ts-thumb lazyload alt=Page 59: cjsdorsetorg1-0: What a volcano is and how it is formed At the surface it erupts to form lava flows and ash deposits Ash deposits result from more explosive activity and lava loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentssitereader034viewer20220520226036c36486bd0e6e1d692012html5thumbnails59jpg 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