Welcome to the Forbidden City earthcahe
The Forbidden City, is a palace complex in central Beijing, China. The former seat of Imperial Chinese Dragon Throne from the Ming dynasty to the end of the Qing dynasty—the years 1420 to 1912, it now houses the Palace Museum. The Forbidden City served as the home of emperors and their households as well as the ceremonial and political center of Chinese government for almost 500
years.
Constructed from 1406 to 1420, the complex consists of 980 buildings and covers 72 ha (over 180 acres). The palace exemplifies traditional Chinese palatial architecture, and has influenced cultural and architectural developments in East Asia and elsewhere. The Forbidden City was declared a World Heritage Site in 1987, and is listed by UNESCO as the largest collection of preserved ancient wooden structures in the world.
Since 1925 the Forbidden City has been under the charge of the Palace Museum, whose extensive collection of artwork and artefacts were built upon the imperial collections of the Ming and Qing dynasties. Part of the museum's former collection is now in the National Palace Museum in Taipei. Both museums descend from the same institution, but were split after the Chinese Civil War. Since 2012, the Forbidden City has seen an average of 15 million visitors annually, and had 16 million visitors in 2016.
Lesson time:
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3).
About 10% of sedimentary rocks are limestones. The solubility of limestone in water and weak acid solutions leads to karst landscapes, in which water erodes the limestone over thousands to millions of years. Most cave systems are through limestone bedrock.
Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner, or as a popular decorative addition to rock gardens.
Limestone is water-soluble under some conditions. Dissolution pitting dissolves hollows in the limestone. On a larger scale, this causes speleogenesis (when caves dissolve in limestone bedrock). On a still larger scale, the dissolved caves collapse, gradually creating karst topography, such as the famous landscapes of Guilin in the South China Karst.
As rocks are broadly fractal (geology journals require a scale to be included in images of rocks), the small rocks can resemble the larger landscape.
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments.
Most sandstone is composed of quartz or feldspar because they are the most resistant minerals to weathering processes at the Earth's surface, as seen in Bowen's reaction series. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions.
Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Fine-grained aquifers, such as sandstones, are better able to filter out pollutants from the surface than are rocks with cracks and crevices, such as limestone or other rocks fractured by seismic activity.
Quartz-bearing sandstone can be converted into quartzite through metamorphism, usually related to tectonic compression within orogenic belts.
Small admission fee to enter the Forbidden City:
CNY 40 (Nov. 1 to the next Mar. 31); CNY 60 (Apr. 1 to Oct. 31)
If you wish to also visit the two special galleries there is a additional fee for each:
(note earthcache is not in these galleries)
CNY 10 for the Treasure Gallery; CNY 10 for the Clock and Watch Gallery
Opening Hours: (Closed on Mondays)
8:30 to 16:30 (Nov. 1 – the next Mar. 31); tickets not available after 15:30 and last entry at 15:40.
8:30 to 17:00 (Apr. 1- Oct.31); tickets not available after 16:00 and last entry at 16:10.
For the earthcache:
Please answer the following questions:
1. There is a center piece stone on a plith in this little garden, what is the name of this type of stone?
2. Is it a type of sandstone or limestone?
3. This is traditionally appreciated by who?
4. Do you see any fossils?
5. What is the cause of the erodion that made pores and holes on this stone?
6. OPTIONAL Take a picture of yourself and/or GPS without revealing and spoilers of this earthcahe.
Email or message your answers to me via my profile.
~~~~~~~~~~~~~~~~~~~~~~
歡迎來到紫禁城土撥鼠
故宮是中國北京市中心的一组宮殿建築。故宮博物院是明朝至清朝末年（即1420年至1912年）的原來的中國皇帝宝座的所在地。紫禁城是皇帝及其家庭的故居，也是中國过去五百年来的政治仪式中心。
該建築建于1406年至1420年，由980座房间組成，佔地72公頃（超過180英畝）。皇宫體現了中國傳統的宮殿建築风格，影響了東亞等地的文化和建築發展。故宮於1987年被宣佈為世界文化遺產，被聯合國教科文組織列為世界上保存量最大的古代木結構建筑群。
自1925年以來，紫禁城一直由故宮博物院負責，故宮博物院在明清兩代皇室藏品的基础之上，因而藏有大量的藝術品和文物。一部分博物館的馆藏現在在台北故宮博物院。這兩個博物館都是從同一個機发展而来，但是在新中國成立之後就分裂了。自2012年以來，紫禁城平均每年接待遊客1500萬人次，2016年遊客達到1600萬人次。
課時：
石灰岩是一種沉積岩，主要由珊瑚，有孔蟲和軟體動物等海洋生物的骨骼碎片組成。其主要材料是礦物質方解石和文石，它們是碳酸鈣（CaCO3）的不同晶型。
約10％的沉積岩是石灰岩。石灰石在水和弱酸性溶液中的溶解度導致岩溶景觀，其中水侵蝕石灰石數千年至數百萬年。大部分的洞穴系統都是通過石灰石基岩。
石灰石具有許多用途：作為建築材料，混凝土（波特蘭水泥）的基本組分，作為道路基部的聚集體，作為白色顏料或填充劑在牙膏或塗料等產品中，作為生產石灰的化學原料，作為一種土壤調節劑，或作為岩石花園的流行裝飾。
石灰石在某些條件下是水溶性的。溶解點蝕溶解石灰石中的空洞。在更大的範圍內，這導致了洞穴形成（當洞穴溶解在石灰石基岩中時）。在更大的規模上，溶洞解體，逐漸形成了岩溶地貌，如桂林南部岩溶著名景觀。
由於岩石是廣泛分形的（地質學期刊需要將岩石的尺度包括在岩石圖像中），所以小岩石可以類似於大的景觀。
砂岩是一個碎屑沉積岩，主要由砂粒（0.0625至2毫米）的礦物顆粒或岩石碎片組成。
大多數砂岩是由石英或長石構成的，因為它們是地球表面風化過程中耐受性最強的礦物，如Bowen的反應系列所見。像砂石一樣，由於礦物質中的雜質，砂岩可以是任何顏色，但最常見的顏色是棕褐色，黃色，紅色，灰色，粉紅色，白色和黑色。由於砂岩層往往形成高度可見的懸崖和其他地形特徵，砂岩的某些顏色已被強烈地確定在某些地區。
主要由砂岩組成的岩層通常允許水和其他流體的滲流，並且具有足夠的多孔性以儲存大量的水，使其成為有價值的含水層和石油儲層。砂岩等細粒含水層比含有裂縫和裂縫的岩石（如石灰石或其他受地震活動破裂的岩石）能更好地濾除表面污染物。
石英砂岩經變質作用可轉化為石英岩，通常與造山帶內的構造擠壓有關。
紫禁城门票费：
40元人民幣（11月1日至3月31日）; 60元（4月1日至10月31日）
如果您還想參觀兩個特別的畫廊，每個畫廊都收取額外的費用：
（注意earthcache不在這些畫廊）
寶物廊10元人民幣;時鐘觀賞廊10元人民幣
开放時間：（星期一闭馆）
8:30至16:30（11月1日至次年3月31日）; 15:30後不可入場，15：40最後入場。
8:30至17:00（4月1日至10月31日）; 16:00後不可入場，16：10最後入場。
對於土豆：
請回答以下問題：
1.這個小花園裡有一塊石頭上的中心石，這種石頭的名字是什麼？
2.是砂岩還是石灰石？
3 這是誰傳統的讚賞？
4.你有沒有看到任何化石？
5.在這塊石頭上製作毛孔和孔洞的過敏原因是什麼？
6.可選拍攝你自己和/或GPS的照片，不要暴露和破壞這個地球。
通過我的個人資料向我發送電子郵件或信息。