Editing Nightcap National Park (section)

==Regional geology and climate==
The park is on the south-eastern edge of the [[Mount Warning]] erosion caldera. Creating features of gullies, ridges and a massif of peaks that form the eroded remnants of the Tweed shield volcano.<ref name=":0">{{Cite book|title = Parks & Reserves of the Tweed Caldera Plan of Management|last = Edwards|first = David|publisher = NSW National Parks and Wildlife Service|year = 2004}}</ref> The tallest peak at Nightcap is Mount Burrell also known as Blue Knob with an elevation of 933m above sea level.<ref name=":1">{{Cite book|title = Visitor Guide: Nightcap National Park and Whian Whain State Conservation Area|publisher = NSW National Parks and Wildlife Service}}</ref> The Nightcap Range is mostly situated in the park and is a spur off the Great Dividing Range.

The basalt and rhyolite lava that once flowed from the Tweed volcano (known as Mount Warning), which erupted over 23 million years ago, has produced various vegetation communities. On soil with a rhyolitic base is warm temperate rainforest that covers much of the park, and the nutrient rich basalt soil produces sub-tropical rainforest.<ref name=":1" /><ref name=":2">{{Cite web|title = The Nightcap Range|url = http://rosebank.ws/nightcap-range.html|website = rosebank.ws|access-date = 2015-05-19|archive-url = https://web.archive.org/web/20150518074753/http://rosebank.ws/nightcap-range.html|archive-date = 18 May 2015|url-status = dead}}</ref>

Nightcap has the highest rainfall in NSW with rain exceeding 2500mm per annum. The mean temperature ranges from 19.1&nbsp;°C to 29.7&nbsp;°C; the region can experience high humidity and temperatures can get close to 40&nbsp;°C. High rainfall events and storms of cyclonic strength can occur during the summer.<ref name=":2" />