RECORD: Darwin, C. R. 2.1836. [Hobart Town field notes, Tasmania]. 2.1836. CUL-DAR40.100-101. Transcribed by Gordon Chancellor. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Gordon Chancellor, typed by Jan Nicholas. Corrections by Kees Rookmaaker, further corrected and edited by John van Wyhe 4.2011, 2024. RN2
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. This file concludes the Hobart Field notes beginning in CUL-DAR40.97-99.
See the annotations in: Banks, M. R. and D. Leaman eds. 1999. Charles Darwin's Field Notes on the geology of Hobart Town — A modern appraisal. Papers and Proceedings of the Royal Society of Tasmania 133(1): 29-50, Text.
Reproduced with the permission of the Royal Society of Tasmania, the Syndics of Cambridge University Library and William Huxley Darwin.
See the introduction to the Geological Diary by Gordon Chancellor.
These transcriptions have been revised and further edited in John van Wyhe and Gordon Chancellor eds., Charles Darwin's geological diary and field notes from the voyage of the Beagle. (OUP forthcoming)
[100]
X11
Friday 12th [February 1836] — Limestone Quarry — Stratified dip about 40 50° — occassional pebbles of quartzose rock — cellular linear cavities — pale brown — pure limestone — layers of flint — very numerous impressions of leaves. said to be different from present time — Whole hill covered by very curious formation, balls of trappean rocks — decomposed, so as to resemble wacke, calcareous aluminous matter (like St Jago) few pebbles — broad fissure in underlying rock & filled up — Volcanic eruption somewhere near subsequent to upheaval but beneath water — Very limited formation — sm. creek
Sandstone in Government domain, not stratified very free — I certainly believe, the 3d formation. — Broken by trap rocks: — There is a hard siliceous sandstone quarried high up, may belong to the older —
Shells in the Government domain. 60 or 80 ft generally round pebbles — much to be said on both sides
30 or 40 — —small shells. — wonderful [numerous] — yet has not quite appearance of upraised beach —Certainly much shells brought by natives — piles stone hatchets — But these may have been upheaved: Bay formed by low land — shells, beach — pebbles of with Serpula
[100v]
X12
Blue Limestone in old formation
12-15 ft above present high water — Before However, the low land had formed Harbor considerable fetch — Yet [sketch of a step terrace] & these facts inclined me to believe, — trifling rise — Mr F. —
oysters have all disappeared within 2 years
Mem. Ascidia in Chiloe — only known with edible animals — Earthquakes
Centre of Island lofty greenstone — divided by valley of the Derwent — On North side grand formation of limestone & some conglomerate, & hard clay slate we see fossils same formation — Limestones & conglomerates replacing beds stones.— Again on North Coast. Basaltic formation — Here the old formation probably extends to Isd Santa Maria — Coal probably 3d formation — On the NE. extensive granite
on the SW. quartz formation — origin of pebbles in old formation — Centre fossil wood in quartz Agate pebbles — Salinas — plains probably some diluv modern or Tertiary series —
Monday 15th — I see the Greenstone of 1st day consists of a dyke, about 100 yards wide — the strata on opposite side; almost a coal — (Mem: Sandstone & black lines in Quarry) vertical and disturbed: — No doubt [word or letter?] Arthurs Coal — Again along the road; greenstones alternate with sedimentary rocks — Mem: case on coast
[101]
(X13
in Government domain = limestone foot of M. Wellington opposite side to my ascent — mass of strata occurring with organic strata — Blue Blackish brown compact crystalline; occurs with slaty impure limestone — Organic remains chiefly Terebratula impressions of a Pecten & beds composed of small oysters, like at Isd of Maria — Dendritic manganese — Corallines chiefly occur in the siliceous strata. — Stratification not quite regular — very rare pebble — uneven stratum of a white pulverulent calcareous aluminous substance, used to burn with limestone — singular aspect:
on road to New Norfolk — we met the very same stone — This formation much stratified — & strata not very much tilted, only very little — Perhaps S.W. ? — (Whole town & valley of Derwent, newer formation). —
old set, alternate with much trappean rocks — At New Norfolk, white rocks, similar to those of Kangaroo point — Some more brittle, coarse & siliceous ([blank])
Some few pebbles, all siliceous & greater number pure white quartz: Higher parts of hill hard reddish sandstone:— General occurrence: —
Very frequent beds of shells from 6 to 10 ft above the breaking of highest tides, on shores of Derwent, where now the water is either fresh or at most brackish & no shells exist
I think an elevation could account for this change of level & state of water — form of small, flat-bottomed creek line valleys: [sketch] — banks of shingle interstratified with such shells. —
[101v]
Friday 12th — Called on Surveyor General Mr Frankland. — Walked to lime kilns & Government Garden =. Sandstone traversed Dined with him in evening.
Saturday 13th — Crossed ferry — Rode to examine beds of shells — Very nice country. [However] returned to. — Dined Attorney General
very pleasant Musical perf[ormance]. very comfortable large numerous rooms, beautifully furnished
Very pleasant guest party —
Sunday 14th. Staied on board writing letters Stopped for want of sun
Monday 15th — Mr Frankland came on board. Went out riding with him — stormy day — dined in evening most pleasant: =
Tuesday 16th — Went in coach to New Norfolk banks of the Derwent — farms — very nice country: mountainous — woody = Walked from town & fell asleep beneath a tree. —
Wednesday — 17th Sailed — Mr Duff —
on the whole like Hobart town better
Blacks removed — excellent police — probably less crime than England. —
N.B. Quartz pebbles & siliceous sandstone in F. W. limestone
Hobart Town
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 27 October, 2024