Catlins Conservation Park. The forest is thick with trees such as rimu, totara, silver beech, matai and kahikatea. Of particular note are the virgin rimu and totara forest remaining in those areas which were too rugged or steep to have been milled by early settlers, and an extensive area of silver beech forest close to the Takahopa River. This is New Zealand's most southerly expanse of beech forest. Many native species of forest plant can be found in the undergrowth of the Catlins forest, including young lancewoods, orchids such as the spider orchid and perching Easter orchid, and many different native ferns. Settlers cleared much of the Catlins' coastal vegetation for farmland, but in some areas the original coastal plant life survives, primarily around cliff edges and some of the bays close to the Tautuku Peninsula, these being furthest from the landward edges of the forest. Plant life here includes many native species adapted to the strong salt-laden winds found in this exposed region. The Catlins coastal daisy (Celmisia lindsayii) is unique to the region, and is related to New Zealand's mountain daisies. Tussocks, hebes, and flaxes are common, as are native gentians, though the endangered native sedge pingao can now rarely be found. In years when the southern rātā flowers well, the coastal forest canopy turns bright red. The rātā also thrives in some inland areas. Geology The geology of the Catlins dates back to over 150 million years ago, when the bedrock of the New Zealand continent was being assembled by thick sediments and volcanic arcs accreting onto the edge of the Gondwana supercontinent in a series of long thin terranes. The parallel hill ranges of the Catlins form part of the Murihiku terrane, which extends inland through the Hokonui Hills as far west as Mossburn. This itself forms part of a larger system known as the Southland Syncline, a fold system which links to similar formations in Tasman District (offset by the Alpine Fault), the North Island and even New Caledonia, away. The north-eastern boundary of this geologic region is marked by the Murihiku escarpment, which runs along the southern edge of the dormant Hillfoot fault line. The Catlins ranges are strike ridges composed of Triassic and Jurassic sandstones, mudstones and other related sedimentary rocks, often with a high incidence of feldspar. Fossils of the late and middle Triassic Warepan and Kaihikuan stages are found in the