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Nostalgia & History > Ottumwa IA depot .. if you have time ; ^ ) read about the stone!Date: 01/10/25 11:11 Ottumwa IA depot .. if you have time ; ^ ) read about the stone! Author: valmont Got this photo on 7/2/87 ... been through Ottumwa many times and always admired the stone work ... and found this info:
Ashlar is a cut and dressed [b]stone[/b], worked using a [b]chisel[/b] to achieve a specific form, typically rectangular in shape. The term can also refer to a structure built from such stones.=12px[1]Ashlar is the finest stone [b]masonry[/b] unit, and is generally rectangular ([b]cuboid[/b]). It was described by [b]Vitruvius[/b] as [i]opus isodomum[/i] or [b]trapezoidal[/b]. Precisely cut "on all faces adjacent to those of other stones", ashlar is capable of requiring only very thin joints between blocks, and the visible face of the stone may be [b]quarry-faced[/b] or feature a variety of treatments: tooled, smoothly polished or rendered with another material for decorative effect.=12px[2][3] One such decorative treatment consists of small grooves achieved by the application of a metal comb. Generally used only on softer stone ashlar, this decoration is known as "mason's drag".=12px[4]Ashlar is in contrast to [b]rubble masonry[/b], which employs irregularly shaped stones, sometimes minimally worked or selected for similar size, or both. Ashlar is related but distinct from other stone masonry that is finely dressed but not quadrilateral, such as curvilinear and [b]polygonal masonry[/b].=12px[3][5]Ashlar may be [b]coursed[/b], which involves lengthy horizontal layers of stone blocks laid in parallel, and therefore with continuous horizontal joints. Ashlar may also be random, which involves stone blocks laid with deliberately discontinuous courses and therefore discontinuous joints both vertically and horizontally. In either case, it generally uses a joining material such as [b]mortar[/b] to bind the blocks together, although [b]dry[/b] ashlar construction, metal ties, and other methods of assembly have been used. The dry ashlar of [b]Inca architecture[/b] in [b]Cusco[/b] and [b]Machu Picchu[/b] is particularly fine and famous. Bet you're happy I did ; ^ ) Edited 1 time(s). Last edit at 01/10/25 12:19 by valmont.  Date: 01/10/25 11:32 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: Gonut1 And now I know!
Go Date: 01/10/25 12:36 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: rrman6 "And that's the way it is", as Walter Cronkite always said in closing his daily radio newscasts.
Date: 01/10/25 12:46 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: train1275 That gives an all new appreciation of the structure !
Date: 01/10/25 13:47 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: swaool Ashlar being the technique used to work and set the stone, but what kind of stone is it? The Wikipedia entry for the Ottumwa depot calls it Lannon Stone which turns out to be a type of dolomitic limestone quarried by the Lannon Stone company. If you scroll down this page, you'll see that their administrative office in Sussex WI is clad in the same sort of stonework used on the Ottumwa depot: https://lannonstone.net/locations/
mike woodruff north platte ne Date: 01/11/25 06:23 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: jcaestecker As Mr. Woodruff states, Ashlar refers to a type of dressing on the face of the stone. It also refers to a set pattern in which the stone is laid. Though Lannon Stone was most frequently used in the Midwest, Arizona flagstone (quarried in northern AZ) was common in the Southwest and Southern CA.
-John Date: 01/12/25 11:40 Re: Ottumwa IA depot .. if you have time ; ^ ) read about the st Author: ntharalson Thanks for positng, V. I'm wondering if this is the same stone used on the Burlington depot.
Nick Tharalson, Marion, IA |