Cov phab ntsa qhuav muaj pes tsawg xyoo?
Cov phab ntsa qhuav muaj pes tsawg xyoo?

Video: Cov phab ntsa qhuav muaj pes tsawg xyoo?

Video: Cov phab ntsa qhuav muaj pes tsawg xyoo?
Video: Koj lub nqe taub haus yog pes tsawg 2024, Kaum ib hlis
Anonim

Lub enduring xav ntawm cov phab ntsa qhuav . Cov phab ntsa qhuav yog ib tug feature ntawm British Countryside. Muaj kwv yees tias muaj ntau dua 5,000 mais hauv Yorkshire Dales ib leeg, qee qhov rov qab mus txog 600 xyoo rau thaum lawv tau tsim los tua hma.

Ib yam li ntawd ib tug yuav nug, yuav ua li cas lub phab ntsa qhuav qhuav?

Saum toj no: A phab ntsa qhuav pob zeb , yog tias nws ua tau zoo nyob rau hauv thawj qhov chaw, tau kawg pua pua xyoo. Tab sis nws ua nyob ntawm qhov pob zeb . Nyob rau hauv lub Cotswolds qhov twg oolitic limestone yog siv, nws yuav tuag sai dua, tej zaum tom qab 100 xyoo.

Ib yam li ntawd, Dry Stone Walling pib thaum twg? Qhuav pob zeb phab ntsa yog ib qho khoom siv qub qub uas rov qab mus rau ntau txhiab xyoo txij li lub sijhawm Neolithic. Pov thawj ntawm phab ntsa qhuav pob zeb thiab kev tsim vaj tsev ntawm Skara Brae ntawm Orkney tau muaj xov tooj cua hnub tim rov qab mus rau c3200 BC, zoo heev khaws cia zoo li nws tau faus los ntawm cov xuab zeb dunes kom txog thaum lub farmstead tau tshawb pom hauv 1850.

Ib yam li ntawd, cov phab ntsa pob zeb muaj pes tsawg xyoo?

Credit: Kathleen Cantner, AGI. Lub hauv paus chiv keeb ntawm New England's phab ntsa pob zeb hnub rov qab mus txog li ntawm 30, 000 thiab 15, 000 xyoo dhau los, thaum Laurentide ice sheet - ib tug seem uas tseem muaj nyob rau hauv Barnes Ice Cap ntawm central Baffin Island - ua nws txoj kev mus rau sab qab teb los ntawm central Canada thiab ces pib retreating.

Yuav ua li cas qhuav pob zeb phab ntsa nyob?

Nws hu ua a qhuav - phab ntsa zeb vim, tsis zoo li lub cib phab ntsa , nws yog tsim los ntawm stacking pob zeb tsis muaj (ntub) mortar los tuav lawv ua ke. Qhuav - pob zeb phab ntsa muaj zog thiab txaus nyiam thiab tuaj yeem kav ntau pua xyoo. Tab sis yog tias koj txiav txim siab tias koj tsis nyiam lawv, koj tuaj yeem rub lawv thiab tsim lawv nce dua lwm qhov.

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